# headroom

> English word · Noun · frequency rank #45,419

## Definitions
1. The vertical clearance above someone's head, as in a tunnel, doorway etc; room (space) for one's head.
2. The vertical measurement, top to bottom, for example for clearance under a bridge.
3. The ability of a system to reproduce loud sounds free of distortion; dynamic headroom.
4. The distance between the actual performance of an algorithm and its maximum possible performance.
5. Synonym of headspace (“space between the top of the contents of a container and its seal”).

## Etymology
From head + room.

## Common misspellings (11)
`ehadroom`, `haedroom`, `headdroom`, `headorom`, `headrom`, `headromo`, `headroomm`, `headrroom`, `heardoom`, `hedaroom`, `hheadroom`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/headroom