fluid

[ floo-id ]
/ ˈflu ɪd /

noun

a substance, as a liquid or gas, that is capable of flowing and that changes its shape at a steady rate when acted upon by a force tending to change its shape.

adjective

pertaining to a substance that easily changes its shape; capable of flowing.
consisting of or pertaining to fluids.
changing readily; shifting; not fixed, stable, or rigid: fluid movements.
convertible into cash: fluid assets.

Origin of fluid

1595–1605; < Latin fluidus, equivalent to flu(ere) to flow + -idus -id4

OTHER WORDS FROM fluid

WORDS THAT MAY BE CONFUSED WITH fluid

fluid gas liquid (see synonym study at liquid)

Example sentences from the Web for fluid

British Dictionary definitions for fluid

fluid
/ (ˈfluːɪd) /

noun

a substance, such as a liquid or gas, that can flow, has no fixed shape, and offers little resistance to an external stress

adjective

capable of flowing and easily changing shape
of, concerned with, or using a fluid or fluids
constantly changing or apt to change
smooth in shape or movement; flowing

Derived forms of fluid

fluidal, adjective fluidness, noun fluidly or fluidally, adverb

Word Origin for fluid

C15: from Latin fluidus, from fluere to flow

Medical definitions for fluid

fluid
[ flōōĭd ]

n.

An amorphous substance whose molecules move freely past one another; a liquid or gas.

adj.

Of or characteristic of a fluid.

Other words from fluid

flu•idi•ty (-ĭdĭ-tē) null n.

Scientific definitions for fluid

fluid
[ flōōĭd ]

A state of matter, such as liquid or gas, in which the component particles (generally molecules) can move past one another. Fluids flow easily and conform to the shape of their containers. See also state of matter viscosity.

Cultural definitions for fluid

fluid

In physics, a substance that flows — usually a liquid or a gas.