definitely
UK: /ˈdef.ɪ.nət.li/ | US: /ˈdef.ən.ət.li/
adv. without doubt; certainly
adv. used to emphasize agreement or confirmation
The word "definitely" stems from the Latin definitus (past participle of definire, meaning "to set bounds to"). The root "definite" entered English via Middle French definit, retaining its core sense of clarity or precision. The suffix "-ly" (from Old English -līce) transforms the adjective into an adverb, reinforcing the idea of unambiguous certainty. Over time, "definitely" evolved into a strong affirmatory marker in Modern English.
She will definitely attend the meeting tomorrow.
This is definitely the best coffee I’ve ever had.
Are you coming? —Definitely!
The project deadline is definitely next Friday.
He definitely improved his skills after the training.