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"
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 natural thing occurring in the composition of something else
"units of nucleic acids"
Oneness, singularity, seen as a component of a whole number; a magnitude of one.
"The single unit on the scale represented the smallest possible measurement we could record."
In plain English: A unit is a single, complete part of something larger that works together as a whole.
"Each soldier in the unit received new uniforms before deployment."
Usage: Use this term to refer to any single item or standard measure considered part of a larger group or system, such as a unit of measurement or an organizational division. It is often confused with "unitary," which describes something consisting of a single undivided whole rather than serving as a component piece.
For each unit.
"Everyone received their own unit of milk for breakfast."
"The unit price on the label helped me compare different brands easily."
The word unit is a later variation of the older form unite, which itself comes from the Latin unitas meaning "oneness." It entered English as a shortened version of these related terms to describe a single individual or thing.