Emphatic adverbs

absolutely/definitely/certainly/exactly

There is not very much difference in meaning or in use when these emphasizing adjectives are used to express strong agreement with a statement, question or suggestion.

Absolutely is perhaps the strongest. If you use exactly, you are emphasizing that what someone has said is 100% correct.

Compare the following:

• Doesn’t Sandra look stunning in that hat?
  Oh, absolutely! I couldn’t agree more.
• Geoffrey is a complete and utter fool.
  Absolutely! / Definitely! / Exactly!
• Will you come shopping with me on Saturday?
  Definitely! / Certainly!
• If we can’t find those tickets, we shan’t be able to get into the show.
  Exactly!
• Are you going to Turkey again this summer?
  Definitely! Without a doubt!