definition of
plug

[1] #1 plug n. [stopper, stopple] blockage consisting of an object designed to fill a hole tightly. wn

[2] #2 plug v. [stop up, secure] fill or close tightly with or as if with a plug; "plug the hole"; "stop up the leak". wn

[3] #3 plug v. [plug away] persist in working hard; "Students must plug away at this problem". wn

[4] #4 plug n. [chew, chaw, cud, quid, wad] a wad of something chewable as tobacco. wn

[5] #5 plug n. [ballyhoo, hoopla, hype] blatant or sensational promotion. wn