We found 5 dictionaries that define the word certainly not:

General (4 matching dictionaries)

1. certainly not: Merriam-Webster
2. certainly not: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

3. Certainly not: Idioms

Phrases: certainly not disguised, certainly not late, more... ▸ Words similar to certainly not ▸ Usage examples for certainly not ▸ Idioms related to certainly not ▸ Wikipedia articles (New!) ▸ Words that often appear near certainly not ▸ Rhymes of certainly not ▸ Invented words related to certainly not