ounce meaning and definition

OUNCE noun

Definition of ounce (noun)

1. a unit of apothecary weight equal to 480 grains or one twelfth of a pound
   • synonyms: apothecaries' ounce, troy ounce
2. a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
   • synonyms: oz.
3. large feline of upland central Asia having long thick whitish fur
   • synonyms: Panthera uncia, snow leopard