dimensions

Concise Oxford English Dictionary © 2008 Oxford University Press:
dimension /dɪˈmɛnʃ(ə)n, dʌɪ-/

▶noun

• 1 a measurable extent, such as length, breadth, or height.

  ■ Physics an expression for a derived physical quantity in terms of fundamental quantities such as mass, length, or time, raised to the appropriate power (acceleration, for example, having the dimension of length × time⁻²).

• 2 an aspect or feature: the cultural dimensions of the problem.

▶verb cut or shape to particular dimensions.

■ (usu. as adj. dimensioned) mark (a diagram) with dimensions.

– derivatives
-dimensional adjective,
dimensionally adverb,
dimensionless adjective.

– origin ME: via OFr. from L. dimensio(n-), from dimetiri ‘measure out’.