plug in

verb plugs in · plugging in · plugged in

1. idiomatic To connect (an electrical device) to a plug socket. Hello, IT. Have you tried turning it off and turning it on again? Ok. Well, are you sure that it's plugged in?

   Opposite: unplug

2. idiomatic To familiarize and integrate (a person) into an organization. The drivers routinely patrol these areas- welfare offices, senior centers, even street corners- asking the Medicare patients to come with them for check-ups in return for cash. […] To get plugged in, we enlisted Lizzie Green, a 75-year-old widow who lives on social security and a small pension. She
3. idiomatic To replace a variable with a number in order to solve an equation. If an equation has three unknowns, you can plug in two of them to find the third.

   Similar: substitute

4. idiomatic To input or enter (data). Want to find out what the bloggers are talking about before it hits the mainstream? Just sign up for PubSub […] and plug in your search terms. This site crawls more than 9 million blogs, public relations newswires, and SEC filings for relevant entries, and then e-mails you the results.
5. To become involved in something. The inability of the gay movement as a whole to interrelate AIDS work with the many other items on its political agenda left vast segments of the lesbian and gay community sitting on the sidelines wondering how and why to plug in.