Definitions
1.nounA contrapuntal piece of music wherein a particular melody is played in a number of voices, each voice introduced in turn by playing the melody.
2.nounAnything in literature, poetry, film, painting, etc., that resembles a fugue in structure or in its elaborate complexity and formality.
3.nounA fugue state.
4.verbTo improvise, in singing, by introducing vocal ornamentation to fill gaps etc.