Phrase guide

Planck time

noun · 1 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.

No pronunciation record was provided for this word.

1

noun

Meaning 1

A natural unit of time, equivalent to the time it takes light to traverse one Planck length; it is the duration of time at which quantum gravity effects are expected to become significant.

Definition source: English Wiktionary via Wiktextract

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

No etymology was provided for this word.

Across languages

Translations

4 source translations are retained for this English entry.

  • French: temps de Planck — unit of time, believed to be the scale at which quantum gravity effects become significant
  • Japanese: プランク時間 (puranku jikan) — unit of time, believed to be the scale at which quantum gravity effects become significant
  • Korean: 플랑크 시간 (peullangkeu sigan) — unit of time, believed to be the scale at which quantum gravity effects become significant
  • Polish: czas Plancka — unit of time, believed to be the scale at which quantum gravity effects become significant