a smell that is only smelt briefly or faintly
I caught a whiff of eau de cologne
a puff or breath of air or smoke
whiffs of smoke emerged from the boiler
(chiefly in baseball or golf) an unsuccessful attempt to hit the ball.
get a brief or faint smell of
he whiffed the broth that was simmering on the stove
(chiefly in baseball or golf) try unsuccessfully to hit the ball.