noun
(sports) A sports event where competitors can choose their own method of participation.
(music) A form of rapping in which the emcee makes up lyrics while performing.
(by extension, attributive) Anything done in an improvised or unrestricted way.
(music) Ellipsis of Latin freestyle, a form of electronic dance music.
verb
(intransitive, especially in rap music) To improvise one's own style; to ad-lib.
(intransitive) To improvise one's dance moves; dance freely.
(intransitive) To improvise something in an unrestricted way.