fluid

noun

A liquid (as opposed to a solid or gas).

Any substance which can flow with relative ease, tends to assume the shape of its container, and obeys Bernoulli's principle; a liquid, gas or plasma.

(specifically, medicine, colloquial, typically in the plural) Intravenous fluids.

adjective

In a state of flux; subject to change.

Moving smoothly, or giving the impression of a liquid in motion.

(not comparable) Of or relating to fluid.

(of an asset) Convertible into cash.

(rare) Genderfluid.

Roots

fluoflu- · Latin · flow

Synonyms for fluid

liquidadj runnyadj fluentadj semiliquidadj ichorn aqueousadj bloodn

Synonyms & related words for fluid

Find synonyms, related words, and the definition of fluid — including liquid, runny, fluent, semiliquid, ichor, aqueous. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to fluid

Explore words related to fluid — words associated with it, words that go with it, and its nearest matches in meaning. Related words include semifluid, liquidness, circumfluent, fluidics, fluidize, fluidly, fluidity, pinchcock. Click any word to make it the center of the map and keep exploring the web of connections.

Synonyms for fluid

Common synonyms for fluid include liquid, runny, fluent, semiliquid, ichor, aqueous, blood — words that share a close meaning. Hover or tap any word on the map for its definition and part of speech.

Where does fluid come from?

The word fluid breaks down into one root of Latin origin: the root flu-, from Latin fluo (“flow”). Explore each root to see other English words built from the same source.