Definition of "fluent" in English

adjective

1. That flows; flowing, liquid.

   • fluent handwriting

2. Able to use a language accurately, rapidly, and confidently.

   • She's fluent in French.

3. (programming) Being or relating to a fluent interface.

   • The payment processor offers a fluent API.

noun

1. (mathematics, obsolete) A continuous variable, especially one with respect to time in Newton's Method of Fluxions.