prime

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prime¹

  • /pɹaɪ̯m/

Rhymes with -aɪm

Where it comes from

From Middle English prime, from Old French prime and its etymon, Latin prīmus (“first”), from earlier prīsmos < *prīsemos < Proto-Italic *priisemos, ultimately from Proto-Indo-European *per- (“beyond, before”). Doublet of primo and primus.

The noun sense "apostrophe-like symbol" originates from the fact that the symbol ′ was originally a superscript Roman numeral one.

adjective primer · primest

  1. First in importance, degree, or rank. Our prime concern here is to keep the community safe.

    Similar: greatest, main, most important, primary, principal, top

  2. First in time, order, or sequence. Both the English and French governments established prime meridians in their capitals.

    Similar: earliest, first, original

  3. First in excellence, quality, or value. This is a prime location for a bookstore.

    Similar: excellent, top quality

  4. Having exactly two integral factors: itself and unity (1 in the case of integers). Thirteen is a prime number.

    Similar: indivisible

  5. Such that if it divides a product, it divides one of the multiplicands.
  6. of an ideal Having its complement closed under multiplication.
  7. of a nonzero module Such that the annihilator of any nonzero submodule is equal to the annihilator of the whole module.
  8. Marked or distinguished by the prime symbol.
  9. Early; blooming; being in the first stage. [...] His ſtarrie Helme unbuckl’d ſhew’d him prime / In Manhood where Youth ended ; by his ſide / As in a glittering Zodiac hung the Sword, / Satans dire dread, and in his hand the Spear.
  10. obsolete Lecherous, lewd, lustful. It is impoſſible you ſhould ſee this, / Were they as prime as Goates, as hot as Monkies, / As ſalt as Wolues, in pride; and fooles as groſſe / As ignorance made drunke: [...]

noun primes

  1. historical The first hour of daylight; the first canonical hour. His larum bell might lowd and wyde be hard, When cause requyrd, but neuer out of time; Early and late it rong, at euening and at prime.
  2. The religious service appointed to this hour.
  3. obsolete The early morning generally. They all as glad, as birdes of ioyous Pryme […]

    Similar: early morning

  4. archaic The earliest stage of something. To this end we see how quickly sundry artes Mechanical were found out in the very prime of the world.
  5. The most active, thriving, or successful stage or period. When I do count the clock that tells the time, And see the brave day sunk in hideous night; When I behold the violet past prime, And sable curls all silver’d o'er with white;

    Similar: bloom, blossom, efflorescence, flower, flush, heyday, peak

  6. The chief or best individual or part. Give him always of the prime; And but a little at a time.

    Similar: choice, prize, quality, select

  7. Something which is first in importance or rank: a prime defense company, mortgage lender, etc. I found just as we were fearful we would find that many of the big primes felt that this was a change of policy on the part of the U.S. Government to let the big fellows take care of it, and they were ready to cut back, and in many instances were cutting back[…]
  8. The first note or tone of a musical scale.
  9. The first defensive position, with the sword hand held at head height, and the tip of the sword at head height.
  10. A prime element of a mathematical structure, particularly a prime number. Some poems, echoing the purpose of early poetic treatises on scientific principles, attempt to elucidate the mathematical concepts that underlie prime numbers. Others play with primes’ cultural associations. Still others derive their structure from mathematical patterns involving primes.

    Similar: prime number

  11. A four-card hand containing one card of each suit in the game of primero; the opposite of a flush in poker.
  12. A series of consecutive blocks. A prime of six prevents the opponent's pieces from passing. I'm threatening to build a prime here.
  13. The symbol ′ used to indicate feet, minutes, derivation and other measures and mathematical operations.
  14. obsolete Any number expressing the combining weight or equivalent of any particular element; so called because these numbers were respectively reduced to their lowest relative terms on the fixed standard of hydrogen as 1.
  15. An inch, as composed of twelve seconds in the duodecimal system.
  16. obsolete The priming in a flintlock. […] he pull’d the Trigger, but Providence being pleas’d to preserve me for some other Purpose, the Cock snapp’d, and miss’d Fire. Whether the Prime was wet in the Pan, or by what other Miracle it was I escap’d his Fury, I cannot say […]
  17. abbreviation Short for prime lens Tomlinson, Shawn M. (2015), Going Pro for $200 & How to Choose a Prime Lens, →ISBN, page 72: “By the time I shifted to my first autofocus film SLR with the Pentax PZ-10, primes were considered things of the past”
  18. A feather, from the wing of the cock ostrich, that is of the palest possible shade.

    Similar: white

  19. A stimulus which causes priming.

Similar: morning · Opposite: composite

prime²

  • /pɹaɪ̯m/

Rhymes with -aɪm

Where it comes from

Related to primage and Latin prīmus.

verb primes · priming · primed

  1. transitive To fill or prepare the chamber of a mechanism for its main work. You'll have to press this button twice to prime the fuel pump.
  2. transitive To apply a coat of primer paint to. I need to prime these handrails before we can apply the finish coat.

    Similar: ground, undercoat

  3. intransitive, obsolete To be renewed. Nights baſhfull Empreſſe, though ſhe often wayne, / As oft repents her darkneſſe ; primes againe ; / And with her circling Hornes does re-embrace / Her brothers wealth, and orbs her ſilver face.
  4. intransitive To serve as priming for the charge of a gun.
  5. intransitive, of a steam boiler To work so that foaming occurs from too violent ebullition, which causes water to become mixed with, and be carried along with, the steam that is formed. Although we took our eight bogies along to Whitstable at 60 m.p.h., and made a clean start from there, after Herne Bay the engine primed badly on Blacksole Bank and nearly stopped before we got over the top. Then we ran like the wind across the marshes with half-regulator, 30 per cent cut-off, and t
  6. To apply priming to (a musket or cannon); to apply a primer to (a metallic cartridge).
  7. To prepare; to make ready. The boys are primed for mischief.
  8. archaic To instruct beforehand, as for an examination; to coach. to prime a witness
  9. UK, dialectal, obsolete To trim or prune. to prime trees
  10. To mark with a prime mark.

prime³

  • /pɹiːm/

Rhymes with -iːm

Where it comes from

From French prime (“reward, prize, bonus”).

noun primes

  1. An intermediate sprint within a race, usually offering a prize and/or points. Most primes are won with gaps on the field; most sprints are in bunches.

Prime⁴

proper noun Primes

  1. A surname.

Thesaurus

Closest in meaning: premier, first, heyday, quality, superior, fine, choice, select, peak, mature, prize, ground, efflorescence, undercoat, bloom, blossom

noun

Similar: morning · Opposite: composite

Translations

Every language

adj first in importance, degree, or rank

Españolprincipal, primordial, primario
日本語最重要 saijūyō, 第一級 daiikkyū
中文首 shǒu, 首要 shǒuyào, 主要 zhǔyào
हिन्दीप्रथम pratham, प्राथमिक prāthmik
Portuguêsprimeira, primeiro, principal
Françaisprincipal
Italianoprincipale, primario
Ελληνικάπρωταρχικός protarchikós
Русскийважне́йший važnéjšij, гла́вный glávnyj, основно́й osnovnój
עבריתראשי rashí

adj first in time, order, or sequence

Españolprimero
日本語最初 saisho, 第一 daiichi
中文首 shǒu, 第一 dìyì
हिन्दीप्रथम pratham
Portuguêsprimeira, primeiro
Françaispremier
Deutscherste
Italianoprimo, iniziale
Ελληνικάπρώτος prótos
Русскийперви́чный pervíčnyj, пе́рвый pérvyj

adj first in excellence, quality, or value

Españolprimo, primoroso, excelente
日本語最良 sairyō, 最高 saikō, 第一級 daiikkyū, 最適 saiteki
中文一流 yīliú, 最好 zuìhǎo, 上等 shàngděng, 高級 /高级 gāojí, 優質 /优质 yōuzhì, yōuzhí
हिन्दीसर्वश्रेष्ठ sarvaśreṣṭh, श्रेष्ठ śreṣṭh
Portuguêsde primeira
Françaisde premier ordre, excellent, supérieur
Italianoottimo, di prima scelta, di prima qualità, di prima categoria
Ελληνικάεκλεκτός eklektós
Русскийпревосхо́дный prevosxódnyj, первокла́ссный pervoklássnyj
العربيةمُمْتَاز mumtāz, فَاخِر fāḵir
עבריתמצויין metsuyán

adj mathematics: having no factors except itself and unity

Españolprimo
日本語素数 sosū, 素 so
中文素數 /素数 sùshù, 質數 /质数 zhìshù
हिन्दीअभाज्य abhājya
Portuguêsprimo
Françaispremier
Deutschprim-
Italianoprimo
Ελληνικάπρώτος prótos
Românăprim
Русскийпросто́й prostój
עבריתראשוני rishoní

adj mathematics: having its complement closed under multiplication

日本語素 so
中文素 sù

noun earliest stage

Españolprimordio
日本語最初 saisho, 初期 shoki, 原始 genshi
中文初期 chūqī
Portuguêsprincípio
Italianoinizi, principio
Русскийнача́ло načálo

noun most active, thriving, or successful stage or period

Españolmejor momento, cresta de la ola, culmen, fastigio
한국어한창 hanchang
日本語最盛期 saiseiki
中文壯年期 /壮年期 zhuàngniánqī, 黃金時期 /黄金时期 huángjīn shíqī, 鼎盛期 dǐngshèngqī, 旺季 wàngjì
Portuguêsauge, ápice
DeutschBlütezeit, Blüte, Glanzzeit, Höhe des Schaffens, Höhepunkt der Laufbahn, die besten Jahre
Italianoall’apice, nel fiore degli anni
Ελληνικάακμή akmí
Русскийрасцве́т rascvét, зени́т zenít

noun chief or best individual or part

中文精華 /精华 jīnghuá, 精髓 jīngsuí

noun music: first note or tone of a musical scale

日本語主音 shuon
中文主音 zhǔyīn
Françaistonique
Italianotonale

noun fencing: first defensive position

日本語第一の構え daiichi no kamae

noun algebra: prime element of a mathematical structure

日本語素 so
中文素数 sùshù
Portuguêsnúmero primo, primo
Françaisnombre premier
Italianonumero primo
Русскийпросто́е число́ prostóje čisló

verb to apply a coat of primer paint to

Españolimprimar, emprimar
日本語下塗りする shitanuri suru
中文涂底漆 tú dǐqī, 上底漆 shàng dǐqī
Françaisapprêter
Deutschgrundieren
Italianodare una vernice di fondo su
Русскийгрунтова́ть gruntovátʹ

verb to serve as priming for the charge of a gun

Españolcebar
Françaisamorcer

verb to prepare a mechanism

Españolcebar, imprimar, emprimar, aparejar, aprestar
日本語準備する junbi suru, 用意する yōi suru
中文起動 /起动 qǐdòng, 啓動 /启动 qǐdòng
Françaisamorcer
Deutschvorbereiten, scharf machen, ansaugen lassen, betriebsfertig machen, bereit machen
Italianopreparare, innescare, caricare, adescare
Русскийгото́вить к рабо́те gotóvitʹ k rabóte

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MLA

"prime." Wiktionary, via Micwyn, micwyn.com/word/prime. Accessed 6 Nov. 2026.

APA

prime. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/prime

Chicago

"prime." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/prime.

BibTeX
@misc{prime_2026,
  title = {prime},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/prime},
  urldate = {2026-11-06}
}