Standard Lemma guide

milliwatt

noun · 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

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No pronunciation record was provided for this word.

1

noun

Meaning 1

One thousandth (10−3) of a watt, an amount of power that can power a small electronic device such as a single microchip. (Consuming 1 milliwatt during a duration of 1 hour consumes 1 milliwatt-hour of energy.).

Definition source: English Wiktionary via Wiktextract

Examples

  • Holonyms: W, watt < kW, kilowatt < MW, megawatt < GW, gigawatt < TW, terawatt < PW, petawatt

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a unit of power equal to one thousandth of a watt

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: power unit

History

Etymology

Etymology tree Proto-Indo-European *sem- Proto-Indo-European *sm̥- Proto-Indo-European *-ih2 Proto-Indo-European *smih2 Proto-Indo-European *ǵhes- Proto-Indo-European *-lom Proto-Indo-European *ǵhéslom Proto-Indo-European *-ih2 Proto-Indo-European *ǵhéslih2 Proto-Indo-European *smih2ǵhéslih2 Proto-Italic *smīɣeslī Latin mīlleder. French milli- English milli- English watt English milliwatt From milli- + watt.

Across languages

Translations

4 source translations are retained for this English entry.

  • Chinese Mandarin: 毫瓦 (háowǎ) — one thousandth of a watt
  • Finnish: milliwatti — one thousandth of a watt
  • French: milliwatt — one thousandth of a watt
  • Thai: มิลลิวัตต์ — one thousandth of a watt