Real Dictionary

lilt
singular noun: If someone's voice has a lilt in it, the pitch of their voice rises and falls in a pleasant way, as if they were singing.

lilt in American English
a merry song or tune with a light, swingy, and graceful rhythm
to sing or play in a light, tripping, or rhythmic manner
to sing, speak, play, or move with a light, graceful rhythm or swing
noun: rhythmic swing or cadence

lilt in British English
(of a melody) to have a lilt
noun: (in music) a jaunty rhythm