certainly

adverb

cer·​tain·​ly ˈsər-tᵊn-lē 

1

: in a manner that is certain : with certainty

2

: it is certain that : assuredly

Synonyms

• all right
• alright
• assuredly
• clearly
• definitely
• doubtless
• easily
• forsooth
• hands down
• inarguably
• incontestably
• incontrovertibly
• indeed
• indisputably
• plainly
• really
• so
• sure
• surely
• truly
• unarguably
• undeniably
• undoubtedly
• unquestionably

Examples of certainly in a Sentence

It will certainly rain tomorrow.

This year's festival was certainly much better than last year's.

I'm certainly going to try.

The new version is most certainly easier to use.

The snake that bit her was almost certainly poisonous.

Recent Examples on the Web

In the immediate aftermath of a major assassination, groups certainly can experience communications breakdowns, confusion, grief, and paranoia. —Sarah E. Parkinson, Foreign Affairs, 11 Nov. 2024

Tems even earned a nomination for Best R&B Song, showing that R&B voters are certainly open to recognizing African music. —Justin Curto, Vulture, 8 Nov. 2024

This is certainly true with the latest phones from both Apple and Google. —Larry Magid, The Mercury News, 7 Nov. 2024

Patch Management is certainly related to the Vulnerable Applications slice in the security score chart. —PCMAG, 7 Nov. 2024

Word History

First Known Use

14th century, in the meaning defined at sense 1

Phrases Containing certainly

• certainly not

Kids Definition

certainly

adverb

cer·​tain·​ly ˈsərt-ᵊn-lē 

1

: in a manner that is certain : for certain

the only event of which anything is certainly known

2

: without doubt : surely

certainly you can do it