# locus

/ˈɫoʊkəs/ (US) · /lˈəʊkəs/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/locus
Updated: 2026-05-07

## Definition

the specific place where something happens or where a particular idea is centered. In math, it is a set of points that all follow the same rule.

For teachers: a central point or place where something happens or is situated; in mathematics, a set of points whose location is determined by stated conditions.

## Examples

- The town square is the locus of social life.
- The university campus became the locus of political protest during the election season.
- In geometry, a circle is defined as the locus of all points in a plane that are at a fixed distance from a central point.

## Pitfalls

- Not "the locuses of power" but "the loci of power" — The word uses the Latin plural 'loci' rather than the standard English '-es' ending.

## Usage notes

- The plural form is 'loci'. Often used in academic contexts to discuss the center of power, activity, or control.

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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.