We found 9 dictionaries that define the word for the first time:

General (8 matching dictionaries)

1. for the first time: Vocabulary.com
2. for the first time: Dictionary.com
3. For the First Time (Count Basie album), For the First Time (Darius Rucker song), For the First Time (Kenny Loggins song), For the First Time (Kim Weston album), For the First Time (The Script song), For the First Time (disambiguation): Wikipedia, the Free Encyclopedia
4. for the first time: Rhymezone
5. for the first time: FreeDictionary.org
6. for the first time: Mnemonic Dictionary
7. for the first time: TheFreeDictionary.com
8. for the first time: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

9. for the first time: Encyclopedia

Definitions from WordNet (for the first time) ▸ adverb:  the initial time Types: novel, unprecedented, unfamiliar, unaccustomed, unusual, more... Phrases: Back for the First Time, For the First Time in Forever, use for the first time, happened for the first time, for the first time in my life, more... ▸ Words similar to for the first time ▸ Usage examples for for the first time ▸ Idioms related to for the first time ▸ Wikipedia articles (New!) ▸ Words that often appear near for the first time ▸ Rhymes of for the first time ▸ Invented words related to for the first time