used when you are giving or asking for information that is completely correct:
The journey took exactly three hours.
That'll be £15 exactly, please.
It tastes exactly the same as the real thing, but has half the fat.
The town centre looks exactly as it did when it was built in 1877.
He's not exactly (= not what I would describe as) good-looking, but he has a certain attraction.
"So you gave her your Walkman?" "Not exactly (= That is not completely true), I lent it to her."
"What you seem to be saying is that more should be invested in the road system and less in the railways." "Exactly (= That is completely correct)."
without any doubt:
Have you definitely decided to go to America?
He definitely said he'd be here.
"Are you going to have children?" "Oh, definitely (= without any doubt)."
"Is she not coming, then?" "No, definitely not."
used as a way of strongly saying 'yes':
"It was an excellent film, though." "Absolutely!"
Student or Learner