[ yoo-nit ]
/ ˈyu nɪt /
a single thing or person.
any group of things or persons regarded as an entity: They formed a cohesive unit.
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.
one of a number of things, organizations, etc., identical or equivalent in function or form: a rental unit; a unit of rolling stock.
any magnitude regarded as an independent whole; a single, indivisible entity.
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.
the least positive integer; one.
Also called unit's place.
- (in a mixed number) the position of the first digit to the left of the decimal point.
- (in a whole number) the position of the first digit from the right of the decimal point.
a machine, part, or system of machines having a specified purpose; apparatus: a heating unit.
Education. a division of instruction centering on a single theme.
Military. an organized body of soldiers, varying in size and constituting a subdivision of a larger body.
- the measured amount of a substance necessary to cause a certain effect; a clinical quantity used when a substance cannot be readily isolated in pure form and its activity determined directly.
- the amount necessary to cause a specific effect upon a specific animal or upon animal tissues.
- an identity element.
- an element in a group, ring, etc., that possesses an inverse.
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Origin of unit
1570; coined by John Dee as a translation of Greek mónas (previously rendered as unity); perhaps influenced by digit
OTHER WORDS FROM unitin·ter·u·nit, adjectivemul·ti·u·nit, adjectivesubunit, nounsu·per·u·nit, noun
Definition for unit (2 of 2)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for unit (1 of 2)
/ (ˈjuːnɪt) /
a single undivided entity or whole
any group or individual, esp when regarded as a basic element of a larger whole
a mechanical part or integrated assembly of parts that performs a subsidiary functiona filter unit
a complete system, apparatus, or establishment that performs a specific functiona production unit
a subdivision of a larger military formation
Also called: unit of measurement A standard amount of a physical quantity, such as length, mass, energy, etc, specified multiples of which are used to express magnitudes of that physical quantitythe second is a unit of time
the amount of a drug, vaccine, etc, needed to produce a particular effect
a standard measure used in calculating alcohol intake and its effect
- (usually plural) the first position in a place-value counting system, representing a single-digit numberin the decimal system the number 27 has 7 units and 2 tens
- (modifier) having a value defined as one for the systemunit vector
Also called: unit set maths logic a set having a single member
short for home unit
short for stock unit
NZ a self-propelled railcar
Word Origin for unit
C16: back formation from unity, perhaps on the model of digit
British Dictionary definitions for unit (2 of 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for unit
[ yōō′nĭt ]
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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.