/aʊns/
noun
An avoirdupois ounce, weighing 1/16 of an avoirdupois pound, or 28.3495 grams.A troy ounce, weighing 1/12 of a troy pound, or 480 grains, or 31.1035 grams.A US fluid ounce, with a volume of 1/16 of a US pint, 1.8047 cubic inches or 29.5735 millilitres.A British imperial fluid ounce, with a volume of 1/20 of an imperial pint, 1.7339 cubic inches or 28.4131 millilitres.A little bit.