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)unitan individual or group or structure or other entity regarded as a structural or functional constituent of a whole“they reduced the number of units and installations”, “the word is a basic linguistic unit”
(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)unita single undivided whole“an idea is not a unit that can be moved from one brain to another”
(n)unit, building blocka single undivided natural thing occurring in the composition of something else“units of nucleic acids”
(n)whole, unitan assemblage of parts that is regarded as a single entity“how big is that part compared to the whole?”, “the team is a unit”