We found 11 dictionaries that define the word at one:

General (10 matching dictionaries)

1. at one: Merriam-Webster
2. at one: Oxford Learner's Dictionaries
3. at one: Collins English Dictionary
4. at one: Wiktionary
5. At one, at one: Dictionary.com
6. At one: Online Plain Text English Dictionary
7. At one: AllWords.com Multi-Lingual Dictionary
8. at one: MyWord.info
9. at one: FreeDictionary.org
10. At one: TheFreeDictionary.com

Medicine (1 matching dictionary)

11. online medical dictionary (No longer online)

Phrases: at one time, at one fell swoop, at one stroke, at one blow, at one with, more... ▸ Words similar to at one ▸ Usage examples for at one ▸ Idioms related to at one ▸ Wikipedia articles (New!) ▸ Words that often appear near at one ▸ Rhymes of at one ▸ Invented words related to at one