(1) wholly, entirely, completely, (2) not at all (with neg. verb)
Example sentences
彼は非常にうろたえていたので彼の答えは全然意味をなさなかった。
He was so confused that his answer did not make any sense.
彼は彼女の手腕に全然驚かなかった。
He was not at all surprised at her ability.
彼は全然勉強しなかった。
He didn't study at all.