WordNet sense 1 (strikingly odd or unusual):

weird

WordNet sense 2 (beyond or deviating from the usual or expected):

curious, odd, peculiar, singular

WordNet sense 3 (being definitely out of the ordinary and unexpected; slightly odd or even a bit weird):

strange

WordNet sense 4 (highly unusual or rare but not the single instance):

unique

WordNet sense 5 (not customary or usual):

unaccustomed

WordNet sense 6 (out of the ordinary):

out-of-the-way

WordNet sense 7 ((of an official) serving an unusual or special function in addition to those of the regular officials):

extraordinary

WordNet sense 8 (not common or ordinarily encountered; unusually great in amount or remarkable in character or kind):

uncommon