We found 2 dictionaries that define the word a split second:

General (2 matching dictionaries)

1. A Split-Second, A Split Second: Wikipedia, the Free Encyclopedia
2. a split second: Longman Dictionary of Contemporary English

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