Open English Wordnet
Nouns
(n)unit of measurement, unitany division of quantity accepted as a standard of measurement or exchange“the dollar is the United States unit of currency”, “a unit of wheat is a bushel”, “change per unit volume”
(n)unit, social unitan organization regarded as part of a larger social group“the coach said the offensive unit did a good job”, “after the battle the soldier had trouble rejoining his unit”
(n)unit, building blocka single undivided natural thing occurring in the composition of something else“units of nucleic acids”