(noun, verb)


1. the striking of one body against another

Definition categories: event, contact, impinging, striking

2. a forceful consequence; a strong effect

- the book had an important impact on my thinking

Similar word(s): wallop

Definition categories: phenomenon, consequence, effect, event, issue, outcome, result, upshot

3. influencing strongly

Similar word(s): encroachment, impingement

Definition categories: act, influence

4. the violent interaction of individuals or groups entering into combat

Similar word(s): shock

Definition categories: act, combat, fight, fighting, scrap

Sentences with impact as a noun:

- The hatchet cut the wood on impact.

- His spine had an impingement; L4 and L5 made impact, which caused numbness in his leg.

- His friend's opinion had an impact on his decision.

- Our choice of concrete will have a tremendous impact on the building's mechanical performance.


1. press or wedge together; pack together

Definition categories: contact, force, squeeze, wedge

2. have an effect upon

Similar word(s): affect, touch

Definition categories: change, alter, modify

Sentences with impact as a verb:

- If fecal incontinence is caused by impacted stool in the rectum, the impaction must be removed.

- I can make the changes, but it will impact the schedule.

- When the hammer impacts the nail, it bends.