Real Dictionary

duck
variable noun: A duck is a very common water bird with short legs, a short neck, and a large flat beak.

duck in American English 1
to plunge or dip under water for a moment
noun: any of numerous wild or domesticated web-footed swimming birds of the family Anatidae, esp. of the genus Anas and allied genera, characterized by abroad, flat bill, short legs, and depressed body

duck in American English 2
any of a large number of relatively small waterfowl with a flat bill, short neck and legs, and webbed feet
intransitive verb: to stoop or bend suddenly; bob
noun: an act or instance of ducking
transitive verb: to lower suddenly

duck in American English 3
a cotton or linen cloth somewhat like canvas but finer and lighter in weight
noun: a heavy, plain-weave cotton fabric for tents, clothing, bags, etc., in any of various weights and widths

duck in American English 4
an amphibious motor vehicle used during WWII
noun: an amphibious military truck

duck in British English 1
noun: any of various small aquatic birds of the family Anatidae, typically having short legs, webbed feet, and a broad blunt bill: order Anseriformes

duck in British English 2
noun: the act or an instance of ducking
verb: to move (the head or body) quickly downwards or away, esp so as to escape observation or evade a blow

duck in British English 3
noun: a heavy cotton fabric of plain weave, used for clothing, tents, etc

duck in British English 4
noun: an amphibious vehicle used in World War II

duck in Hospitality
noun: Duck is the flesh of a type of water bird, eaten as food.