Entry Word: plug

Function: verb

Meaning: 1 to close up so that no empty spaces remain <plugged the hole in the wall with putty> — see fill 2
2 to devote serious and sustained effort <plugged away at solving the math problem> — see labor
3 to provide publicity for <the actress is giving lots of interviews to plug her latest movie> — see publicize 1
4 to strike with a missile from a gun <the gangster plugged the stool pigeon as a lesson for any others who were tempted to talk> — see shoot 3