- 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.
ounce definition by Webster's New World
- : 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: Old French 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
ounce definition by American Heritage Dictionary
- 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