Ready in the use of words; voluble; copious; having words at command; and uttering them with facility and smoothness; as, a fluent speaker; hence, flowing; voluble; smooth; -- said of language; as, fluent speech.

easy and graceful in shape; "a yacht with long, fluent curves"

smooth and unconstrained in movement; "a long, smooth stride"; "the fluid motion of a cat"; "the liquid grace of a ballerina"; "liquid prose"

a function, or relation, with a situation term (by convention) as its last argument

a function whose domain is the space Sit of situations

In artificial intelligence, a fluent is a condition that can change over time. In logical approaches to reasoning about actions, fluents can be represented in first-order logic by predicates having an argument that depends on time. For example, the condition “the box is on the table”, if it can change over time, cannot be represented by \mathrm{On}(\mathrm{box},\mathrm{table}); a third argument is necessary to the predicate \mathrm{On} to specify the time: \mathrm{On}(\mathrm{box},\mathrm{table},t) means that the box is on the table at time t.

Flowing or capable of flowing; liquid; glodding; easily moving.

spoken, written, done, or otherwise performed effortlessly, smoothly, readily and easily.

A variable quantity, considered as increasing or diminishing; -- called, in the modern calculus, the function or integral.

A current of water; a stream.