Simple Definition of dimension

: the length, width, height, or depth of something : a measurement in one direction (such as the distance from the ceiling to the floor in a room)

: the amount or number of things that something affects or influences

: a part of something
Full Definition of dimension
1 a (1) : measure in one direction; specifically : one of three coordinates determining a position in space or four coordinates determining a position in space and time (2) : one of a group of properties whose number is necessary and sufficient to determine uniquely each element of a system of usually mathematical entities (as an aggregate of points in real or abstract space) <the surface of a sphere has two dimensions>; also : a parameter or coordinate variable assigned to such a property <the three dimensions of momentum> (3) : the number of elements in a basis of a vector space b : the quality of spatial extension : magnitude, size c : a lifelike or realistic quality d : the range over which or the degree to which something extends : scope —usually used in plural e : one of the elements or factors making up a complete personality or entity : aspect
2 obsolete : bodily form or proportions
3 : any of the fundamental units (as of mass, length, or time) on which a derived unit is based; also : the power of such a unit
4 : wood or stone cut to pieces of specified size
5 : a level of existence or consciousness
Examples of dimension in a sentence
She carefully measured each dimension of the room.
The social dimensions of the problem must also be taken into account.
Origin and Etymology of dimension
Middle English, from AngloFrench, from Latin dimension, dimensio, from dimetiri to measure out, from dis + metiri to measure — more at measure
First Known Use: 14th century
Other Mathematics and Statistics Terms
dimension
Definition of dimension
dimensioned
dimensioning
play \ˈmen(t)shəniŋ\transitive verb
1 : to form to the required dimensions
2 : to indicate the dimensions of (as on a drawing)
1754
First Known Use of dimension
1754
Rhymes with dimension
DIMENSION Defined for Kids
dimension
playDefinition of dimension for Students
: the length, width, or height of something
Medical Dictionary
Learn More about dimension

Thesaurus: All synonyms and antonyms for dimension Medical Dictionary: Definition of dimension Spanish Central: Translation of dimension Nglish: Translation of dimension for Spanish speakers Britannica English: Translation of dimension for Arabic speakers Britannica.com: Encyclopedia article about dimension
Seen and Heard
What made you want to look up dimension? Please tell us where you read or heard it (including the quote, if possible).