The Collaborative International Dictionary of English v.0.48:

Flair \Flair\ (fl[^a]r), n. [OE. flaireodor, fr. OF. & F. flair,
   fr. OF. flairier, F. flairer, to smell, LL. flagrare for L.
   fragrare. See Flagrant.]
   1. Smell; odor. [Obs.]
      [Webster 1913 Suppl.]

   2. Sense of smell; scent; fig., discriminating sense.
      [Webster 1913 Suppl.]

   3. A talent or ability, expecially an intuitive one that
      makes performance of a task appear easy; an intuitive
      appreciation; a knack; as, she has a flair for acting.
      [PJC]

   4. An attractive way of performing a task; style.
      [PJC]

WordNet (r) 3.0 (2006):

flair
    n 1: a natural talent; "he has a flair for mathematics"; "he has
         a genius for interior decorating" [syn: flair, genius]
    2: distinctive and stylish elegance; "he wooed her with the
       confident dash of a cavalry officer" [syn: dash, elan,
       flair, panache, style]
    3: a shape that spreads outward; "the skirt had a wide flare"
       [syn: flare, flair]

The Free On-line Dictionary of Computing (19 January 2023):

FLAIR

    An early system on the IBM 650.

   [Listed in CACM 2(5):16 (May 1959)].

   (1995-03-17)