momentum.

1. In classical mechanics, mass multiplied by velocity.

2. An impetus that helps an activity or trend keep developing.

Use it for

Words that belong together

• conservation of momentum
• angular momentum

On the page

The collision transferred momentum to the smaller craft.

Usage notes

Primary category: academic / formal. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: analysis, description. Commonness: moderately common.