The Oxford Thesaurus An A-Z Dictionary of Synonyms - curious adj.

1) inquisitive, inquiring, interested: I am curious to know what you were doing in there all night. 2) snooping, prying, intrusive, meddlesome, interfering, Colloq nosy: Our neighbours are entirely too curious about our activities. 3) odd, peculiar, eccentric, strange, outr‚, queer, unusual, outrageous, offbeat, weird, bizarre, unconventional, freakish, exotic, singular, out of the ordinary, extraordinary, erratic, pixilated, quaint, outlandish, grotesque, aberrant, abnormal, singular, irregular, deviant, deviate, Colloq kinky, nuts, nutty; Slang Brit barmy: How do you explain Frieda's curious behaviour?