# interlock

/ˌɪntɝˈɫɑk/ (US) · /ˌɪntəlˈɒk/ (UK) · CEFR B2 · Verb

Source: https://englishreference.com/word/interlock
Updated: 2026-10-18

## Definition

to fit two or more things together so they hold each other firmly, like the fingers of your two hands.

For teachers: to fit or join two or more parts together so they lock and cannot move separately. Applies to physical parts such as gears or fingers and to abstract elements such as plans or stories that connect closely.

## Examples

- They interlock their fingers when they hold hands.
- The gears interlock to transfer power from the motor to the wheels.
- The two narratives interlock so tightly that removing one chapter would collapse the logic of the other, revealing how carefully the author planned the structure.

## Synonyms

mesh

## Antonyms

separate

## Usage notes

- The verb is both transitive and intransitive; often used reciprocally of two parts joining each other.

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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.