v. & n.
--v.
1. intr. & tr. (of the wind) blow lightly, shift about.
2 intr. be variable or evasive.
3 intr. (of a flame, leaves, etc.) flicker, flutter.
4 intr. make the sound of a light wind in breathing etc.
--n. a slight movement of air.
Derivatives:
whiffler n.
Etymology: WHIFF + -LE(4)