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Word

dimension

noun C1
UK /daɪˈmɛn.ʃən/
US /dɪˈmɛn.ʃən/

Meanings

noun

a measurement of something’s size, especially length, width, or height

dimension: a measurement of something’s size, especially length, width, or height
noun

an important aspect or feature of a situation, problem, or idea

dimension: an important aspect or feature of a situation, problem, or idea
noun

a way of describing space by the number of directions needed (e.g., two-dimensional or three-dimensional)

dimension: a way of describing space by the number of directions needed (e.g., two-dimensional or three-dimensional)

Definition

A dimension is a measurable aspect of something, such as its length, width, height, or overall size.

A dimension is a way to measure or describe the size of an object, often in terms of length, width, and height. It can also mean an important feature or aspect of a situation, idea, or problem. In geometry and science, it may refer to the number of directions needed to describe a space, such as two-dimensional or three-dimensional space.

Examples

  • Before ordering the sofa, I double-checked every dimension to be sure it would fit through the doorway.
  • She explored the ethical dimension of the debate rather than focusing only on the technical details.
  • The architect adjusted the building’s dimension slightly to improve the proportions of the facade.
  • They modelled the object in three dimension to test how it would look under different lighting.

Common mistake

Learners often confuse dimension (a measurable size/aspect) with size and use it as an uncountable noun, but it is usually countable (e.g., 'the dimensions of the box').