We found 3 dictionaries that define the word in all seriousness:

General (3 matching dictionaries)

1. in all seriousness: Merriam-Webster
2. in all seriousness: Oxford Learner's Dictionaries
3. in all seriousness: Longman Dictionary of Contemporary English

▸ Words similar to in all seriousness ▸ Usage examples for in all seriousness ▸ Idioms related to in all seriousness ▸ Wikipedia articles (New!) ▸ Words that often appear near in all seriousness ▸ Rhymes of in all seriousness ▸ Invented words related to in all seriousness