mid-14c., "an odor," from Old French flair "odor or scent," from flairer "to smell," from Vulgar Latin *flagrare, dissimilated from Latin fragrare "emit (a sweet) odor" (see fragrant). Sense of "special aptitude" is American English, 1925, perhaps from notion of a hound's ability to track scent.
language
An early system on the IBM 650.
[Listed in CACM 2(5):16 (May 1959)].
(1995-03-17)