dimension

dimension — noun

1. a number that tells you how large something is by showing the distance from one

1.nounB1
Definition

a number that tells you how large something is by showing the distance from one side to another

Example

The carpenter checked the width and height dimensions of the door before cutting the wood.

collocation: check the dimensions of [something]

What are the exact dimensions of that cardboard box?

collocation: exact dimensions of [object]

Common collocations
  • check the dimensions of
  • exact dimensions
  • overall dimensions
  • measure the dimensions
  • dimensions of + object
Synonyms
  • measurement

    more general; dimension implies a specific direction (length, width, or height)

  • size

    refers to how big something is overall, not a single directional measurement

  • proportion

    focuses on the relationship between dimensions rather than the numbers themselves

Grammar Patterns

dimension(s) + of + object

Usage Note

Often used in the plural form when describing the complete size of an object. The pattern 'dimensions of + object' is the most common grammatical frame.

Common Mistakes

❗ 'The dimension of the box are 30 by 50 cm.' ✅ 'The dimensions of the box are 30 by 50 cm.' — use the plural 'dimensions' when stating width, height, and length together.

2. a particular part or side of a situation, problem, or idea that can be examined

2.nounB2
Definition

a particular part or side of a situation, problem, or idea that can be examined or considered separately

Example

The financial dimension of the hospital building project was more important than the team had realised.

collocation: [adjective] dimension of [something]

Roya’s article explores the cultural dimension of the food people eat every day.

Common collocations
  • cultural dimension
  • political dimension
  • social dimension
  • economic dimension
  • emotional dimension
  • moral dimension
  • legal dimension
  • new dimension
  • add a dimension
Synonyms
  • aspect

    more common and neutral; dimension suggests a perspective you choose to look from

  • facet

    implies many interconnected sides like a cut gem; more vivid than dimension

  • element

    suggests a basic or essential component rather than a perspective

Grammar Patterns

[adjective] dimension of [something]

Usage Note

Frequently paired with adjectives describing the type of perspective (cultural, political, social, economic, emotional, moral, legal). Often in the singular; the plural ('dimensions') implies multiple distinct facets.

Common Mistakes

❗ 'There are many dimension to this issue.' ✅ 'There are many dimensions to this issue.' — use the plural when referring to multiple aspects.

❗ 'The dimension of trust is important.' (when meaning 'aspect') ✅ 'The dimension of trust is important.' — this is actually correct; but be careful not to confuse this sense with sense 1 (physical measurement) when the context is abstract.

3. the general size, scale, or importance of a situation, problem, or task, especia

3.nounB2
Definition

the general size, scale, or importance of a situation, problem, or task, especially when it is larger or more serious than expected

Example

The full dimension of the disaster only became clear after the flood waters went down.

the full dimension of [situation noun]

Lien was shocked by the dimension of the task that lay ahead of her.

Common collocations
  • full dimension
  • true dimension
  • dimension of the problem
  • dimension of the task
  • grasp the dimension of
Synonyms
  • scale

    very close in meaning; dimension emphasises the size itself, scale emphasises extent relative to something

  • extent

    focuses on how far something reaches; slightly more formal

  • magnitude

    suggests greatness of size or importance; more formal and dramatic

Grammar Patterns

the full / true dimension of [something]

Usage Note

Typically used in the singular with 'the' and often modified by 'full' or 'true'. Unlike sense 1, this sense does not take numerical measurements — it describes scale in a more abstract, qualitative way.

Common Mistakes

❗ 'I measured the dimension of the problem.' (when meaning 'scale') ✅ 'I realised the dimension of the problem.' — 'measure' suggests physical measurement (sense 1); use verbs like 'understand', 'realise', or 'grasp' with this sense.

dimension — verb

Word family

  • dimensional
    adjectiveB2
  • three-dimensional
    adjectiveB1
  • multi-dimensional
    adjectiveC1
  • dimensionless
    adjectiveC1

Synonym discussion

Sense: noun/2

While dimension, aspect, facet, element, and feature all refer to parts of something larger, they highlight different qualities. Dimension suggests a perspective or lens through which something can be viewed — it is often used with classifying adjectives like cultural, political, or emotional, inviting the listener to consider a particular angle. Aspect is the most neutral and general term, referring to any one part of a situation or idea without implying a particular viewpoint. Facet is a more vivid word that suggests one surface of a complex, multi-sided whole (like a cut gem). Element points to a fundamental or necessary component that the whole cannot exist without. Feature emphasises a noticeable or distinctive characteristic that stands out. For example, you can say 'the financial dimension of the project' (a perspective), 'every aspect of the plan' (all parts), 'another facet of the problem' (a side), 'a key element of the design' (a basic part), or 'the app’s best feature' (a standout quality).

aspect ↗facet ↗element ↗feature ↗

Common collocations

Prepositions

  • dimensions of

Etymology

LatinFrenchEnglish

The word 'dimension' comes from Latin 'dimensio', meaning 'a measuring', which came from 'dimetiri' ('to measure out'). This verb combines 'dis-' ('apart') and 'metiri' ('to measure'). It entered English through Old French in the 14th century, first used for geometric measurements, and later developed the broader figurative senses of 'aspect' and 'scope' that are common today.