1. прил. ; кратк. форма от напрасный
2. предик. ; безл.
(it is) useless; (it is) no use
3. нареч.
1) ( тщетно )
in vain, for nothing, vainly, to no purpose
2) ( несправедливо )
wrongly, wrongfully, unjustly
вы напрасно так думаете — you shouldn't think that; you are wrong to think that (way)