We found one dictionary that defines the word in a split second:

Miscellaneous (1 matching dictionary)

1. in a split second: Idioms

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