unusual adj.
VERBS appear, be, look, seem | become | consider sth It was considered unusual for a gentleman's son to study medicine.
ADV. decidedly, distinctly, extremely, highly, particularly, really, very This is a highly unusual case. | by no means, hardly, not at all It's not at all unusual to feel very tired in the early months of pregnancy. | a bit, fairly, a little, pretty, quite, rather, relatively, slightly, somewhat | enough, sufficiently The arrival of a taxi was unusual enough; an unknown woman getting out of it was sensational.
PREP. for It's unusual for a woman to do this job.
You can also check other dicts: unusual (English, 中文解释 ), wordnet sense, Collins Definition