- The definition of an ounce is 1/16 of a pound or a very small amount of something.
- If you have 1/16 of a pound of caviar, this is an example of an ounce of caviar.
- If you show only a tiny amount of compassion to someone who is suffering when you'd be expected to show more, this is an example of when you show an ounce of compassion.
- : symbol for all preceding senses, oz
- a unit of weight, equal to pound avoirdupois or 16 drams (28.3495 grams)
- a unit of weight, equal to pound troy or 20 pennyweights (31.1035 grams)
- a unit of weight, equal to pound apothecaries' weight or 8 drams (31.1035 grams)
- fluid ounce
- any small amount: an ounce of care
Origin: OFr unce from Classical Latin uncia, a twelfth, twelfth part of a foot or pound, origin, originally , unit, akin to Classical Latin unus, one
Origin: Middle English once from Old French from l'once, mistaken for lonce from Vulgar Latin an unverified form luncea from Classical Latin lynx, lynx
Used by arrangement with John Wiley & Sons, Inc.
- Abbr. oza. A unit of weight in the U.S. Customary System, an avoirdupois unit equal to 437.5 grains (28.35 grams).b. A unit of apothecary weight, equal to 480 grains (31.10 grams). See Table at measurement.
- A fluid ounce. See Table at measurement.
- A tiny bit: not an ounce of sympathy.
Origin: Middle English unce, from Old French, from Latin ūncia; see oi-no- in Indo-European roots.
Origin: Middle English unce, from Old French once, alteration of lonce, from Vulgar Latin *luncea, from Latin lynx, lync-, lynx, from Greek lunx; see leuk- in Indo-European roots.
ounce - Medical Definition
noun Abbr. oz, oz.
- A unit of weight in the US Customary System, an avoirdupois unit equal to 437.5 grains or 28.35 grams.
- A unit of apothecary weight equal to 480 grains or 31.10 grams.
- A fluid ounce.
ounce - Phrases/Idioms
ounce - Science Definition
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