in a definite manner; unambiguously.

unequivocally; positively.

(used to express complete agreement or strong affirmation)

Are you starting your diet tomorrow? Definitely!

adverb

doubtfully , dubiously , indefinitely , questionably

adverb

absolutely , beyond any doubt , categorically , clearly , decidedly , doubtless , doubtlessly , easily , explicitly , expressly , far and away * , finally , indubitably , no ifs ands or buts about it , obviously , plainly , positively , specifically , surely , undeniably , unequivocally , unmistakably , unquestionably , without doubt , without fail , without question