Dictionary

certainly

adverb cer·tain·ly \-lē\

: without doubt

: of course

Full Definition of CERTAINLY

1
:  in a manner that is certain :  with certainty
2
:  it is certain that :  assuredly
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First Known Use of CERTAINLY

14th century
CERTAINLY Defined for Kids

certainly

adverb cer·tain·ly \ˈsər-tən-lē\

Definition of CERTAINLY for Kids

1
:  without fail <I will certainly help.>
2
:  without doubt <You certainly don't look your age.>

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