plunk Syllabification: (plunk)Pronunciation: /pləNGk/ informalTranslate plunk | into Spanish Definition of plunk verb 1 [no object] play a keyboard or plucked stringed instrument, especially in an inexpressive or unskilled way. 2 [with object] US hit (someone) abruptly. 3 (also plank) [with object] chiefly North American put or set (something) down heavily or abruptly:she plunked her purse on top of the bar pay (money) on the spot or abruptly:I gladly plunked down my ten dollars (plunk oneself down) sit down in a hurried or undignified way:she plunks herself down on the stool noun 1the sound made by abruptly plucking a string of a stringed instrument. 2US a heavy blow. Derivatives plunker noun Origin: early 19th century: probably imitativeplunk in other Oxford dictionaries Definition of plunk in the British & World English dictionary