1

unit

noun \ ˈyü-nət \

Definition of unit

1 a :the first and least natural number :one
b :a single quantity regarded as a whole in calculation
2 :a determinate quantity (as of length, time, heat, or value) adopted as a standard of measurement: such as
a :an amount of work used in education in calculating student credits
b :an amount of a biologically active agent (such as a drug or antigen) required to produce a specific result — compare international unit
3 a :a single thing, person, or group that is a constituent of a whole
b :a part of a military establishment that has a prescribed organization (as of personnel and materiel)
c :a piece or complex of apparatus serving to perform one particular function
d :a part of a school course focusing on a central theme
e :a local congregation of Jehovah's Witnesses
f :a small molecule especially when combined in a larger molecule
  • repeating units of a polymer
g :an area in a medical facility and especially a hospital that is specially staffed and equipped to provide a particular type of care
  • an intensive care unit

Examples of unit in a Sentence

  1. The family is the basic unit of society.

  2. The search party broke up into smaller units.

  3. Their army unit guarded the border.

  4. Feet and meters are units of length.

  5. The dollar is the principal unit of American currency.

Recent Examples of unit from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unit.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of unit

back-formation from unity

Other Number-Related Terms


2

unit

adjective

Definition of unit

:being, relating to, or measuring one unit

First Known Use of unit

1633

Other Mathematics and Statistics Terms



UNIT Defined for English Language Learners

unit

noun

Definition of unit for English Language Learners

  • : a single thing, person, or group that is a part of something larger

  • : a part of a hospital where a particular type of care is provided

  • : a particular amount of length, time, money, etc., that is used as a standard for counting or measuring


UNIT Defined for Kids

unit

noun \ ˈyü-nət \

Definition of unit for Students

1 :a single thing, person, or group forming part of a whole There are 36 units in my apartment building.
2 :the least whole number :one
3 :a fixed quantity (as of length, time, or value) used as a standard of measurement
  • An inch is a unit of length.
4 :a part of a school course with a central theme

Medical Dictionary

unit

noun \ ˈyü-nət \

medical Definition of unit

1 :an amount of a biologically active agent (as a drug or antigen) required to produce a specific result under strictly controlled conditions
  • a unit of penicillin
— see international unit
2 :a small molecule especially when combined in a larger molecule
  • repeating units of a polymer
3 :an area in a medical facility and especially a hospital that is specially staffed and equipped to provide a particular type of care
  • an intensive care unit

Learn More about unit


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