Momentous – Of great importance or significance

To remember the definition of the word momentous, use the following mnemonic:

Looking back, the best moment for us (momentous) was when we had a family photograph. It is of great importance to me and hangs in pride of place.

Examples of momentous in a sentence

His friends all recognised that this was a momentous occasion.

The momentous event ended with spectacular fireworks.

To move overseas was a momentous decision for the company.