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
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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.
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