Standard Lemma guide

headroom

noun · 7 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • CMU ARPABET: HH EH1 D R UW2 M Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The vertical clearance above someone's head, as in a tunnel, doorway etc; room (space) for one's head.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: room, space, volume

2

noun

Meaning 2

The vertical measurement, top to bottom, for example for clearance under a bridge.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

The ability of a system to reproduce loud sounds free of distortion; dynamic headroom.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: business, electrical-engineering, electricity, electromagnetism, electronics, energy, engineering, natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

The distance between the actual performance of an algorithm and its maximum possible performance.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

Synonym of headspace (“space between the top of the contents of a container and its seal”).

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: headspace

Antonyms: none provided

6

noun

Meaning 6

the capacity of a system to reproduce loud sounds without distortion

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: dynamic headroom

Antonyms: none provided

Broader terms: high fidelity, hi-fi

7

noun

Meaning 7

vertical space available to allow easy passage under something

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: headway, clearance

Antonyms: none provided

Broader terms: room, way, elbow room

History

Etymology

From head + room.

Across languages

Translations

6 source translations are retained for this English entry.

  • Finnish: vapaa korkeus — vertical clearance
  • German: Kopffreiheit — vertical clearance
  • Polish: nadszybie — vertical clearance
  • Spanish: pierrecto — vertical clearance
  • Finnish: korkeus — vertical measurement
  • Polish: prześwit — vertical measurement
Real reading context

headroom in complete knowledge articles