Definition of "Duck" :

noun: small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs

noun: a heavy cotton fabric of plain weave; used for clothing and tents

noun: flesh of a duck (domestic or wild)

noun: (cricket) a score of nothing by a batsman

verb: avoid or try to avoid fulfilling, answering, or performing (duties, questions, or issues)

verb: to move (the head or body) quickly downwards or away

"Before he could duck, another stone struck him."

verb: submerge or plunge suddenly

verb: dip into a liquid