1. нареч. ( несомненно ) undoubtedly; ( абсолютно ) absolutely; ( безоговорочно ) unconditionally
2. вводн. сл. ( конечно ) there is no doubt that, of course, undoubtedly; ( ответ ) certainly
безусловно он знает от этом — there is no doubt that he knows about it, he certainly knows about it