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Definition of Momentous
1. Adjective. Of very great significance. "A momentous event" 
Definition of Momentous
1. a. Of moment or consequence; very important; weighty; as, a momentous decision; momentous affairs.
Definition of Momentous
1. [adj]
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1. Adjective. Of very great significance. "A momentous event" 
1. a. Of moment or consequence; very important; weighty; as, a momentous decision; momentous affairs.
1. [adj]