Standard Lemma guide

gigasecond

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

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1

noun

Meaning 1

An SI unit of time equal to 109 seconds. Symbol: Gs. (= 31.7098 years)

Definition source: English Wiktionary via Wiktextract

Topics: metrology

Examples

  • Holonyms: century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond
  • Meronyms: quectosecond < rontosecond < yoctosecond < zeptosecond < attosecond < femtosecond < picosecond < nanosecond < microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond < fortnight < month < year

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From giga- + second.

Across languages

Translations

2 source translations are retained for this English entry.

  • Slovak: gigasekunda — a unit of time
  • Swedish: gigasekund — a unit of time