Definition of dimension
1a mathematics (1) : measure in one direction the dimensions of the room; specifically : one of three coordinates (see 3coordinate 1a) 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 (such as an aggregate of points in real or abstract space) the surface of a sphere has two dimensions; also : a parameter (see parameter 1) or coordinate variable assigned to such a property the three dimensions of momentum (3) : the number of elements in a basis (see basis 5) of a vector spaceb : the quality of spatial extension : magnitude, size … the town's modest dimensions and leisurely ways … — Jane Shellhasec : a lifelike or realistic quality uses eccentric dialogue to add dimension to her charactersd : the range over which or the degree to which something extends : scope —usually used in plural the vast dimensions of the disastere : one of the elements or factors making up a complete personality or entity : aspect the social and political dimensions of the problem
2 obsolete : bodily form or proportions … my dimensions are as well compact, my mind as generous, and my shape as true … — Shakespeare
3 mathematics : 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 … a secular as well as spiritual dimension … — Catherine Bates
dimensionalplay \-ˈmench-nəl, -ˈmen(t)-shə-nəl\ adjective
dimensionalityplay \-ˌmen(t)-shə-ˈna-lə-tē\ noun
dimensionallyplay \-ˈmench-nə-lē, -ˈmen(t)-shə-nəl-ē\ adverb
dimensionlessplay \-ˈmen(t)-shən-ləs\ adjective
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.
Recent Examples of dimension from the Web
While tensions have been running high in recent years between police and black people around the country, there was no immediate indication the killing had a racial dimension.
So choosing the right path, including detours into promising valleys, requires a mental map showing all the effects of all the mutations at once—a map with not just three dimensions, but thousands.
Draw thin black lines along your features to give your face dimension.
Visitors tried on 3-D glasses to see yellow smiley face balloons take dimension from a rectangular space showcasing a southern tropical setting.
Congress has the ability to better advance America’s national security in several dimensions by increasing defense spending, putting national finances on sounder footing, and moving ahead in a bipartisan way to solve our national problems.
That helps show more of a spreadsheet than the movie screen like dimensions of current models.
The game is a physics engine operating in 4D space, allowing you to play with objects and explore the fourth dimension.
The technology sector, which on many dimensions is a leader for the U.S. economy, is over-represented by white males (and that goes for the industry of venture capital as well).
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dimension'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
DIMENSION Defined for English Language Learners
Definition of dimension for English Language Learners
: 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
DIMENSION Defined for Kids
Definition of dimension for Students
: the length, width, or height of something
Seen and Heard
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