certainly

Meanings

1. 1
   adv

   definitely or positively

   I will certainly attend the party.

2. 2
   adv

   In a way which is certain; with certainty.

   he verily thought he had young live frogs in his belly, qui vivebant ex alimento suo, that lived by his nourishment, and was so certainly persuaded of it, that for many years following he could not be rectified in his conceit.

3. 3
   adv

   Without doubt, surely.

   The accident was certainly caused by human error.

4. 4
   adv

   An emphatic affirmative answer; of course.

   Would you like it with ice?  Certainly, and with lemon please.

Etymology

From Middle English certeynly; equivalent to certain + -ly.