Certainly Definition

sûrtn-lē
adverb
Undoubtedly; definitely.
This is certainly not my writing.
American Heritage
Yes.
Webster's New World
By all means; of course.
You may certainly join us.
American Heritage
Beyond a doubt; surely.
Webster's New World

In a way which is certain; with certainty.

Wiktionary

Other Word Forms of Certainly

Adjective

Base Form:
certainly
Superlative:
most-certainly

Origin of Certainly

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