Phrase guide

fluid ounce

noun · 4 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

Any of various units of volume used for liquid measure, all approximately 1.73–1.83 cubic inches or 28.4–30 milliliters.

A unit of volume equal to one sixteenth of a US pint or approximately 29.6 ml

Definition source: English Wiktionary via Wiktextract

Usage: US

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Any of various units of volume used for liquid measure, all approximately 1.73–1.83 cubic inches or 28.4–30 milliliters.

A unit of volume equal to one twentieth of an imperial pint or approximately 28.4 ml

Definition source: English Wiktionary via Wiktextract

Usage: UK

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

a United States unit of capacity or volume equal to 1.804 cubic inches

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: fluidounce

Antonyms: none provided

Broader terms: United States liquid unit

4

noun

Meaning 4

a British imperial unit of capacity or volume (liquid or dry) equal to 8 fluid drams or 28.416 cubic centimeters (1.734 cubic inches)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: fluidounce

Antonyms: none provided

Broader terms: British capacity unit, Imperial capacity unit

History

Etymology

No etymology was provided for this word.

Across languages

Translations

6 source translations are retained for this English entry.

  • Finnish: nesteunssi — unit of volume for liquid measure
  • German: Flüssigunze — unit of volume for liquid measure
  • Irish: unsa leachtach — unit of volume for liquid measure
  • Italian: oncia fluida — unit of volume for liquid measure
  • Polish: uncja objętości — unit of volume for liquid measure
  • Portuguese: onça líquida — unit of volume for liquid measure