A single aspect of a given thing.

A measure of spatial extent in a particular direction, such as height, width or breadth, or depth.

A construct whereby objects or individuals can be distinguished.

(geometry) The number of independent coordinates needed to specify uniquely the location of a point in a space; also, any of such independent coordinates.

(linear algebra) The number of elements of any basis of a vector space.

(physics) One of the physical properties that are regarded as fundamental measures of a physical quantity, such as mass, length and time.

(computing) Any of the independent ranges of indices in a multidimensional array.

(science fiction, fantasy) A universe or plane of existence.

(transitive) To mark, cut or shape something to specified dimensions.

(transitive, programming) To specify the size of (an array or similar data structure); to allocate.