certainly.
In a way which is certain; with certainty.
Meaning & usage
In a way which is certain; with certainty.
Without doubt, surely.
The accident was certainly caused by human error.
That was certainly sweet of him.
An emphatic affirmative answer; of course.
Would you like it with ice? Certainly, and with lemon please.
Where this word comes from
From Middle English certeynly; equivalent to certain + -ly.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.