# dimension

/dɪˈmɛnʃən/ (US) · /daɪmˈɛnʃən/ (UK)

Source: https://englishreference.com/word/dimension
Updated: 2026-06-19

## Senses

### 1. measurement

noun · CEFR B2

a measurement of something in one direction, such as its height, width, or length.

For teachers: a measure of spatial extent in a particular direction, typically height, width, or depth.

- We need to know the exact dimensions of the room before we buy a new sofa.
- The architect specified the precise dimensions of the structural beams to ensure the roof could support the weight of the winter snow.

Usage: Often used in the plural when referring to the overall size of an object.

### 2. aspect or feature

noun · CEFR C1 · Academic

a particular part or feature of a situation.

For teachers: a distinct component or aspect of a situation, problem, or concept.

- The new law adds a political dimension to the environmental debate.
- The discovery of the ancient manuscript adds an entirely new dimension to our understanding of early trade routes in the region.

### 3. physics and math

noun · CEFR C1 · Technical

the number of coordinates needed to find a point in space, like 3D.

For teachers: the number of independent coordinates required to uniquely specify a point within a mathematical space.

- In physics, time is often described as the fourth dimension.
- The algorithm operates in a high-dimensional space, processing hundreds of variables simultaneously to predict market fluctuations.

### 4. computing

noun · CEFR C1 · Technical

one of the ranges used to organize data in a large table or array.

For teachers: any of the independent ranges of indices in a multidimensional array or data structure.

- The programmer defined a three-dimensional array to store the weather data.
- When the dataset grew too large, the engineers had to reduce the number of dimensions to improve the processing speed of the neural network.

### 5. parallel world

noun · CEFR B2

a different world or plane of existence, often in science fiction stories.

For teachers: a hypothetical or fictional plane of existence or parallel universe.

- In the movie, the hero travels to another dimension to save his family.
- The science fiction novel explores the terrifying possibility of creatures crossing over from a parallel dimension into our own.

### 6. to set size

verb · CEFR C2 · Formal · Technical

to give something a specific size or to mark its measurements.

For teachers: to specify the size of a data structure or to shape a physical object to specific measurements.

- The engineer had to dimension the parts carefully so they would fit together.
- The software allows users to dimension the architectural drawing automatically, ensuring all labels match the scale of the model.

## Examples

- We need to measure every dimension of the room before buying furniture.
- The new evidence added a political dimension to the investigation that the detectives had not expected.
- In theoretical physics, string theory suggests the existence of several hidden dimensions beyond the four we experience in our daily lives, though these remain mathematically rather than physically observable.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.