We found 7 dictionaries that define the word in a vacuum:

General (6 matching dictionaries)

1. in a vacuum: Merriam-Webster
2. in a vacuum: Oxford Learner's Dictionaries
3. in a vacuum: Cambridge Advanced Learner's Dictionary
4. in a vacuum: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

5. in a vacuum: Idioms

Phrases: explosion in a vacuum, happen in a vacuum, more... ▸ Words similar to in a vacuum ▸ Usage examples for in a vacuum ▸ Idioms related to in a vacuum ▸ Wikipedia articles (New!) ▸ Words that often appear near in a vacuum ▸ Rhymes of in a vacuum ▸ Invented words related to in a vacuum