ounce: meaning and definitions

A unit of weight in the U.S. Customary System, an avoirdupois unit equal to 437.5 grains (28.35 grams).

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.

See snow leopard.