a unit of liquid measure, equal to gill or pint or 8 fluid drams (29.5734 milliliters): the British and Canadian imperial fluid ounce equals of an imperial pint or 28.4122 milliliters: abbrev. fl oz
nounAbbr. fl. oz.
- A unit of volume or capacity in the US Customary System, used in liquid measure, equal to 29.57 milliliters (1.804 cubic inches).
- A unit of volume or capacity in the British Imperial System, used in liquid and dry measure, equal to 28.41 milliliters (1.734 cubic inches).