Momentous describes an important event or moment in time. ... Momentous and momentary share the root word moment but momentary describes just one fleeting moment in time. A momentary occurrence can certainly be momentous, but it's not always the case.

What is the difference between momentary and momentous?

Momentary means to stay for few seconds. Momentous means very important.

What is momentous occasion?

adjective. If you refer to a decision, event, or change as momentous, you mean that it is very important, often because of the effects that it will have in the future.