Definitions:

1. fill or close tightly with or as if with a plug verb
   • plug the hole
2. insert a plug into verb
   • plug the wall
3. insert as a plug verb
   • We plugged the wine bottle with a cork.
4. persist in working hard verb
   • Students must plug away at this problem

Synonyms:

• ballyhoo
• chew
• fire hydrant
• fireplug
• hoopla
• hype
• jade
• male plug
• plug away
• secure
• spark plug
• sparking plug
• stopper
• stopple

NearBy Words:

• plug-in
• plug-ugly
• plugboard
• plugged
• plugger
• plughole