Standard Lemma guide

kilo-

prefix · 2 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.

  • kĭl′ə-
  • Australian, Canada, General-American, Received-Pronunciation, Scotland: /ˌkɪl.ə-/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • New-Zealand: /ˌkəl.ə-/

1

prefix

Meaning 1

In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by a thousand (1000).

Definition source: English Wiktionary via Wiktextract

Usage: morpheme

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: chilia-

Antonyms: milli-

2

prefix

Meaning 2

Synonym of kibi- (“multiplying the unit to which it is attached by 210 = 1024”).

Definition source: English Wiktionary via Wiktextract

Usage: morpheme, proscribed

Topics: computing, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: mul:Ki-, kibi-

Antonyms: none provided

History

Etymology

Borrowed from French kilo-, irregularly derived from Ancient Greek χίλιοι (khílioi, “one thousand”). The etymologically "correct" form would be chili- or chilo-, resulting in forms such as chiliasme (“chiliasm”) or chilopode (“centipede”); but the French, when creating the prefix, had to avoid a possible (standard) pronunciation of chi as /ʃi/, too close to the vulgar verb chier (“to shit”).

Across languages

Translations

57 source translations are retained for this English entry.

  • Albanian: kilo- — prefix
  • Basque: kilo- — prefix
  • Belarusian: кіла- (kila-) — prefix
  • Bulgarian: кило- (kilo-) — prefix
  • Catalan: quilo- — prefix
  • Catalan: kilo- — prefix
  • Chinese Cantonese: 千- (cin1) — prefix
  • Hakka Chinese: 千- (chhiên-) — prefix
  • Chinese: 千- (zh-min-nan) — prefix
  • Chinese Mandarin: 千- (qiān-) — prefix
  • Czech: kilo- — prefix
  • Danish: kilo- — prefix
  • Dutch: kilo- — prefix
  • Esperanto: kilo- — prefix
  • Estonian: kilo- — prefix
  • Finnish: kilo- — prefix
  • French: kilo- — prefix
  • Galician: quilo- — prefix
  • German: kilo- — prefix
  • Greek: χιλιό- (chilió-) — prefix
  • Greek: χιλιο- (chilio-) — prefix
  • Hindi: सहस्र- (sahasra-) — prefix
  • Hungarian: kilo- — prefix
  • Icelandic: kíló- — prefix
  • Ido: kilo- — prefix
  • Indonesian: kilo- — prefix
  • Ingrian: kilo- — prefix
  • Irish: cilea- — prefix
  • Italian: chilo- — prefix
  • Italian: kilo- — prefix
  • Japanese: キロ- (kiro-) — prefix
  • Korean: 킬로- (killo-) — prefix
  • Latvian: kilo- — prefix
  • Lithuanian: kilo- — prefix
  • Malagasy: kilao- — prefix
  • Malay: kilo- — prefix
  • Marathi: सहस्र- (sahasra-) — prefix
  • Nepali: सहस्र- (sahasra-) — prefix
  • Norwegian Bokmål: kilo- — prefix
  • Norwegian Nynorsk: kilo- — prefix
  • Polish: kilo- — prefix
  • Portuguese: quilo- — prefix
  • Portuguese: kilo- — prefix
  • Romanian: kilo- — prefix
  • Russian: кило- (kilo-) — prefix
  • Serbo-Croatian: kilo- — prefix
  • Slovak: kilo- — prefix
  • Slovene: kilo- — prefix
  • Spanish: kilo- — prefix
  • Spanish: quilo- — prefix
  • Spanish: kili- — prefix
  • Swedish: kilo- — prefix
  • Tagalog: libo- — prefix
  • Thai: กิโล- (gì-loo) — prefix
  • Turkish: kilo- — prefix
  • Ukrainian: кіло- (kilo-) — prefix
  • Vietnamese: ki-lô — prefix