"unit" in the noun sense
1. unit of measurement, unit
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"
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"
3. unit, 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"
a single undivided whole
"an idea is not a unit that can be moved from one brain to another"
5. unit, building block
a single undivided natural thing occurring in the composition of something else
"units of nucleic acids"
6. whole, unit
an assemblage of parts that is regarded as a single entity
"how big is that part compared to the whole?"
"the team is a unit"
Source: WordNet® (An amazing lexical database of English)
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