| 1. | a single thing or person. |
| 2. | any group of things or persons regarded as an entity: They formed a cohesive unit. |
| 3. | one of the individuals or groups that together constitute a whole; one of the parts or elements into which a whole may be divided or analyzed. |
| 4. | one of a number of things, organizations, etc., identical or equivalent in function or form: a rental unit; a unit of rolling stock. |
| 5. | any magnitude regarded as an independent whole; a single, indivisible entity. |
| 6. | Also called dimension. any specified amount of a quantity, as of length, volume, force, momentum, or time, by comparison with which any other quantity of the same kind is measured or estimated. |
| 7. | the least positive integer; one. |
| 8. | Also called unit's place.
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| 9. | a machine, part, or system of machines having a specified purpose; apparatus: a heating unit. |
| 10. | Education. a division of instruction centering on a single theme. |
| 11. | Military. an organized body of soldiers, varying in size and constituting a subdivision of a larger body. |
| 12. | Medicine/Medical.
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| 13. | Mathematics.
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| Unitarian. |
unit u·nit (y&oomacr;'nĭt)
n.
An entity regarded as an elementary structural or functional constituent of a whole.
A precisely specified quantity in terms of which the magnitudes of other quantities of the same kind can be stated.
The quantity of a serum, drug, or other agent necessary to produce a specific effect.