Standard Lemma guide

simultaneous

adj · 3 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: /ˌsɪm.əlˈteɪ̯.ni.əs/
  • UK: /ˌsɪm.əlˈteɪ̯.njəs/
  • US: /ˌsaɪ̯.məlˈteɪ̯.ni.əs/
  • US: /ˌsaɪ̯.məlˈteɪ̯.njəs/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -eɪniəs
  • rhymes with -eɪnɪəs
  • CMU ARPABET: S AY2 M AH0 L T EY1 N IY0 AH0 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Happening at the same moment.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

To be solved for the same values of variables.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: mathematics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective satellite

Meaning 3

occurring or operating at the same time

Definition source: Princeton WordNet 3.0

Examples

  • a series of coincident events

Meaning relationships

Synonyms: coincident, coincidental, coinciding, concurrent, co-occurrent, cooccurring

Antonyms: none provided

History

Etymology

From Medieval Latin simultaneus, from simultim (“at the same time, extended”), from Latin simul (“together, at the same time”); compare similar.

Across languages

Translations

59 source translations are retained for this English entry.

  • Arabic: مُتَزَامِن (mutazāmin) — occurring at the same time
  • Belarusian: адначасо́вы (adnačasóvy) — occurring at the same time
  • Bulgarian: едновременен (ednovremenen) — occurring at the same time
  • Catalan: simultani — occurring at the same time
  • Chinese Mandarin: 同時 /同时 (tóngshí) — occurring at the same time
  • Czech: současný — occurring at the same time
  • Czech: souběžný — occurring at the same time
  • Danish: samtidig — occurring at the same time
  • Dutch: gelijktijdig — occurring at the same time
  • Dutch: simultaan — occurring at the same time
  • Esperanto: samtempa — occurring at the same time
  • Finnish: samanaikainen — occurring at the same time
  • French: simultané — occurring at the same time
  • Galician: simultáneo — occurring at the same time
  • Georgian: თანადროული (tanadrouli) — occurring at the same time
  • Georgian: ერთდროული (ertdrouli) — occurring at the same time
  • Georgian: იმავდროული (imavdrouli) — occurring at the same time
  • Georgian: ერთჟამიერი (ertžamieri) — occurring at the same time
  • German: gleichzeitig — occurring at the same time
  • German: simultan — occurring at the same time
  • Greek: ταυτόχρονος (taftóchronos) — occurring at the same time
  • Hungarian: egyidejű — occurring at the same time
  • Hungarian: szimultán — occurring at the same time
  • Indonesian: bersamaan — occurring at the same time
  • Italian: simultaneo — occurring at the same time
  • Italian: concomitante — occurring at the same time
  • Japanese: 同時の (dōji no) — occurring at the same time
  • Korean: 동시적인 (dongsijeogin) — occurring at the same time
  • Latin: contemporāneus — occurring at the same time
  • Latin: simultāneus — occurring at the same time
  • Malay: serentak — occurring at the same time
  • Manx: coghleashagh — occurring at the same time
  • Māori: tautokorua — occurring at the same time
  • Māori: tukutahi — occurring at the same time
  • Māori: ngātahi — occurring at the same time
  • Māori: ngātatahi — occurring at the same time
  • Māori: tahi — occurring at the same time
  • Norwegian: samtidig — occurring at the same time
  • Norwegian: samstundes — occurring at the same time
  • Old English: samod — occurring at the same time
  • Polish: równoczesny — occurring at the same time
  • Polish: jednoczesny — occurring at the same time
  • Portuguese: simultâneo — occurring at the same time
  • Russian: одновре́ме́нный (odnovréménnyj) — occurring at the same time
  • Russian: синхро́нный (sinxrónnyj) — occurring at the same time
  • Scottish Gaelic: co-amail — occurring at the same time
  • Serbo-Croatian: си̏мулта̄н — occurring at the same time
  • Serbo-Croatian: исто̀времен — occurring at the same time
  • Serbo-Croatian: исто̀добан — occurring at the same time
  • Serbo-Croatian: sȉmultān — occurring at the same time
  • Serbo-Croatian: istòvremen — occurring at the same time
  • Serbo-Croatian: istòdoban — occurring at the same time
  • Spanish: simultáneo — occurring at the same time
  • Swedish: samtidig — occurring at the same time
  • Tagalog: santaknain — occurring at the same time
  • Ukrainian: одноча́сний (odnočásnyj) — occurring at the same time
  • Finnish: yhteinen (but see yhtälöryhmä) — mathematics
  • Malay: serentak — mathematics
  • Manx: cofraueagh — mathematics
Real reading context

simultaneous in complete knowledge articles