Standard Lemma guide

decompression

noun · 6 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.

  • UK: /ˌdiːkəmˈpɹɛʃən/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: D IY2 K AH0 M P R EH1 SH AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

The process of decompressing.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Examples

  • The decompression of large data files may take a while.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The restoration to atmospheric pressure of a person who has spent time under higher pressure (such as a diver).

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A mode of operation of some internal combustion engines which reduces the engine's compression ratio, making it easier to start but significantly increasing fuel consumption.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

The relief of pressure on a body part by surgery.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

relieving pressure (especially bringing a compressed person gradually back to atmospheric pressure)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: decompressing

Antonyms: compression

Broader terms: easing, easement, alleviation, relief

6

noun

Meaning 6

restoring compressed information to its normal form for use or display

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: compression

Broader terms: decoding, decryption, decipherment

History

Etymology

Etymology tree Proto-Indo-European *de Proto-Indo-European *-h1 Proto-Indo-European *déh1 Proto-Italic *dē Latin dē Latin dē-der. English de- English compression English decompression From de- + compression.

Across languages

Translations

16 source translations are retained for this English entry.

  • Catalan: descompressió — process of decompressing
  • Chinese: 減壓 /减压 (jiǎnyā) — process of decompressing
  • French: décompression — process of decompressing
  • German: Dekomprimierung — process of decompressing
  • German: Dekompression — process of decompressing
  • Italian: decompressione — process of decompressing
  • Japanese: 減圧 — process of decompressing
  • Māori: whakarohatanga — process of decompressing
  • Portuguese: descompressão — process of decompressing
  • Spanish: descompresión — process of decompressing
  • Catalan: descompressió — restoration to atmospheric pressure of a person
  • Chinese: 減壓 /减压/减压 (jiǎnyā) — restoration to atmospheric pressure of a person
  • French: décompression — restoration to atmospheric pressure of a person
  • German: Dekompression — restoration to atmospheric pressure of a person
  • Italian: decompressione — restoration to atmospheric pressure of a person
  • Portuguese: descompressão — restoration to atmospheric pressure of a person