We found one dictionary that defines the word a quantum leap:

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1. a quantum leap: Idioms

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