Standard Lemma guide

improbable

adj · 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.

  • General-American: /ɪmˈpɹɑbəbl̩/
  • Received-Pronunciation: /ɪmˈpɹɒbəbl̩/
  • UK: Recorded audio is listed in the source snapshot.
  • US: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: IH2 M P R AA1 B AH0 B AH0 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

adj

Meaning 1

Not likely to be true.

Definition source: English Wiktionary via Wiktextract

Examples

  • It's highly improbable that aliens abducted you.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Not likely to happen.

Definition source: English Wiktionary via Wiktextract

Examples

  • Due to the loss of power, it is improbable that we will begin on time.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective

Meaning 3

not likely to be true or to occur or to have occurred

Definition source: Princeton WordNet 3.0

Examples

  • legislation on the question is highly unlikely
  • an improbable event

Meaning relationships

Synonyms: unlikely

Antonyms: probable

4

adjective satellite

Meaning 4

too improbable to admit of belief

Definition source: Princeton WordNet 3.0

Examples

  • a tall story

Meaning relationships

Synonyms: marvelous, marvellous, tall(a)

Antonyms: none provided

5

adjective satellite

Meaning 5

having a probability too low to inspire belief

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: unbelievable, unconvincing, unlikely

Antonyms: none provided

History

Etymology

Borrowed from Latin improbābilis. By surface analysis, im- + probable.

Across languages

Translations

48 source translations are retained for this English entry.

  • Armenian: անհավանական (anhavanakan) — not likely to be true
  • Belarusian: непраўдападо́бны (njeprawdapadóbny) — not likely to be true
  • Bulgarian: неправдоподо́бен (nepravdopodóben) — not likely to be true
  • Catalan: improbable — not likely to be true
  • Czech: nepravděpodobný — not likely to be true
  • Dutch: onwaarschijnlijk — not likely to be true
  • Finnish: epätodennäköinen — not likely to be true
  • French: invraisemblable — not likely to be true
  • Georgian: არასარწმუნო (arasarc̣muno) — not likely to be true
  • Georgian: წარმოუდგენელი (c̣armoudgeneli) — not likely to be true
  • Georgian: არადამაჯერებელი (aradamaǯerebeli) — not likely to be true
  • Georgian: დაუჯერებელი (dauǯerebeli) — not likely to be true
  • Georgian: დამაჯერებლობას მოკლებული (damaǯereblobas moḳlebuli) — not likely to be true
  • Georgian: ნაკლებად შესაძლებელი (naḳlebad šesaʒlebeli) — not likely to be true
  • Georgian: ნაკლებად სავარაუდო (naḳlebad savaraudo) — not likely to be true
  • German: unwahrscheinlich — not likely to be true
  • Greek: απίθανος (apíthanos) — not likely to be true
  • Hungarian: valószínűtlen — not likely to be true
  • Japanese: 疑わしい (utagawashii) — not likely to be true
  • Japanese: 低確率の (teikakuritsu no) — not likely to be true
  • Polish: nieprawdopododny — not likely to be true
  • Portuguese: improvável — not likely to be true
  • Romanian: improbabil — not likely to be true
  • Russian: неправдоподо́бный (nepravdopodóbnyj) — not likely to be true
  • Slovak: nepravdepodobný — not likely to be true
  • Spanish: improbable — not likely to be true
  • Spanish: inverosímil — not likely to be true
  • Swedish: osannolik — not likely to be true
  • Ukrainian: неправдоподі́бний (nepravdopodíbnyj) — not likely to be true
  • Armenian: անհավանական (anhavanakan) — not likely to happen
  • Belarusian: невераго́дны (njevjerahódny) — not likely to happen
  • Bulgarian: невероя́тен (neverojáten) — not likely to happen
  • Danish: usandsynlig — not likely to happen
  • Dutch: onwaarschijnlijk — not likely to happen
  • Finnish: epätodennäköinen — not likely to happen
  • French: improbable — not likely to happen
  • Galician: improbable — not likely to happen
  • German: unwahrscheinlich — not likely to happen
  • Greek: απίθανος (apíthanos) — not likely to happen
  • Hungarian: valószínűtlen — not likely to happen
  • Japanese: 疑わしい (utagawashii) — not likely to happen
  • Japanese: 低確率の (teikakuritsu no) — not likely to happen
  • Portuguese: improvável — not likely to happen
  • Russian: невероя́тный (neverojátnyj) — not likely to happen
  • Spanish: improbable — not likely to happen
  • Swedish: osannolik — not likely to happen
  • Swedish: föga troligt — not likely to happen
  • Ukrainian: неймові́рний (nejmovírnyj) — not likely to happen