Dictionary
cer•tain•ly
Pronunciation: (sûr'tn-lē), [key]—
adv.
1. with certainty; without doubt; assuredly:
I'll certainly be there.
2. yes, of course:
Certainly, take the keys.
3. surely; to be sure:
He certainly is successful. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.