Source : Webster's Revised Unabridged Dictionary (1913)

Bizarre \Bi*zarre"\, a. [F. bizarre odd, fr. Sp. bizarro
   gallant, brave, liberal, prob. of Basque origin; cf. Basque
   bizarra beard, whence the meaning manly, brave.]
   Odd in manner or appearance; fantastic; whimsical;
   extravagant; grotesque. --C. Kingsley.

Source : WordNet®

bizarre
     adj : conspicuously or grossly unconventional or unusual;
           "restaurants of bizarre design--one like a hat, another
           like a rabbit"; "famed for his eccentric spelling"; "a
           freakish combination of styles"; "his off-the-wall
           antics"; "the outlandish clothes of teenagers"; "outre
           and affected stage antics" [syn: {eccentric}, {freakish},
            {freaky}, {flaky}, {off-the-wall}, {outlandish}, {outre}]