Standard Lemma guide

subspace

noun · 5 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.

  • /ˈsʌb.speɪs/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -ʌbspeɪs
  • CMU ARPABET: S AH1 B S P EY2 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A subset of a space which is a space in its own right.

Definition source: English Wiktionary via Wiktextract

Usage: countable

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Any (often unspecified) method of communicating or travelling faster than light speed.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: literature, media, publishing, science-fiction

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

An alternative dimension or universe, access to or use of which permits faster-than-light travel or communications; hyperspace.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: literature, media, publishing, science-fiction

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

The psychological state of the submissive or bottom during sadomasochistic activity.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: BDSM, lifestyle, sexuality

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: bottomspace

Antonyms: none provided

5

noun

Meaning 5

a space that is contained within another space

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: mathematical space, topological space

History

Etymology

Etymology tree Proto-Indo-European *upó Proto-Italic *supo Latin sub Latin sub-der. English sub- Latin spatiumbor. Old French espace Anglo-Norman spacebor. Middle English space English space English subspace From sub- + space.

From sub (“submissive”) + space (“state of mind”).

Across languages

Translations

19 source translations are retained for this English entry.

  • Catalan: subespai — subset
  • Czech: podprostor — subset
  • Dutch: deelruimte — subset
  • Esperanto: subspaco — subset
  • Finnish: aliavaruus — subset
  • French: sous-espace — subset
  • German: Unterraum — subset
  • German: Teilraum — subset
  • Hindi: उपसमष्टि (upasmaṣṭi) — subset
  • Icelandic: hlutrúm — subset
  • Italian: sottospazio — subset
  • Japanese: 亜空間 (akuukan) — subset
  • Portuguese: subespaço — subset
  • Romanian: subspațiu — subset
  • Russian: подпространство (podprostranstvo) — subset
  • Spanish: subespacio — subset
  • Swedish: underrum — subset
  • Finnish: aliavaruus — method of communicating
  • Portuguese: subspace — psychological state