fluid (fluids plural )
1 n-mass A fluid is a liquid.
FORMAL The blood vessels may leak fluid, which distorts vision..., Make sure that you drink plenty of fluids., ...fluid retention.
2 adj Fluid movements or lines or designs are smooth and graceful.
The forehand stroke should be fluid and well balanced.
3 adj A situation that is fluid is unstable and is likely to change often. usu v-link ADJ
(=changeable)
fluid ounce (fluid ounces plural )A fluid ounce is a measurement of liquid. There are twenty fluid ounces in a British pint, and sixteen in an American pint. n-count num N, oft N of n