definition of
unit

[1] #1 unit n. [unit of measurement] any 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". wn

[2] #2 unit n. an individual or group or structure or other entity regarded as a structural or functional constituent of a whole; "the reduced the number of units and installations"; "the word is a basic linguistic unit". wn

[3] #3 unit n. [social unit] an 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". wn

[4] #4 unit n. a single undivided whole; "an idea is not a unit that can be moved from one brain to another". wn

[5] #5 unit n. [building block] a single undivided natural thing occurring in the composition of something else; "units of nucleic acids". wn