monumental

Definitions

Great in importance, extent, or size.

Serving as or resembling a monument; massive or enduring.

Examples

The discovery of the ancient ruins was a monumental achievement for the archaeological team.

She made a monumental effort to finish the project before the deadline.

The new law represents a monumental shift in the country's environmental policy.

Synonyms

colossal enormous gigantic immense vast significant historic

Antonyms

insignificant trivial small tiny minor unimportant negligible