What does impact mean?
Impact refers primarily to a significant or powerful effect. As a noun, it describes the influence an action, event, policy, or person has on a person, institution, or broader situation: a policy may have a positive or negative impact on employment, technology may have an impact on communication, or an event may have an immediate impact on public opinion. As a verb, impact means to affect or influence something in this meaningful way. It can also refer physically to a forceful collision between objects, such as a vehicle impacting a barrier. The word is especially common in formal reporting, academic discussion, business, and public policy, but it is also widely understood in everyday speech. Compared with 'effect,' 'impact' often places greater emphasis on significance, force, or consequences. It is a useful word when discussing how one part of a system changes the behaviour or fortunes of another.
A significant or powerful effect produced by an action, event, person, or thing; also, the forceful contact of one object with another.
"The discovery had a significant impact on modern medicine."
Often used with 'on' when naming the thing affected: 'an impact on the economy.' In its physical sense, it is frequently paired with words such as 'vehicular,' 'environmental,' or 'high.'
To have a significant effect on someone or something; to strike another object or surface with force.
"Rising costs are impacting household budgets across the country."
The transitive use is common in journalism and public discussion. It is sometimes considered less formal than 'affect,' although its use is well established.
Use the plural when referring to several separate effects, consequences, or collisions.
"The policy's impacts on employment and wages were widely debated."
The noun and verb are stressed differently: IMPact when it names an effect, imPACT when it describes producing that effect.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does impact come from?
The word comes from Latin impactus, a noun formed from the past participle of impingere, meaning 'to strike against' or 'to dash against.' It entered English in the 17th century, initially with the physical sense of a collision or strike and later developing the more figurative sense of a forceful or significant effect. The Latin family includes words such as 'impinge' and 'impingement,' while the related root also appears in 'impetus' and 'impetuous.'
Related word forms
How impact is actually used
The noun is common in formal, educational, journalistic, and business contexts, where it often appears in phrases such as 'have an impact on' or 'the impact of.' The verb is less common than 'affect' in formal writing but is increasingly used, especially in journalism and public discussion. In the physical sense of striking something, the word is more often used for vehicles, projectiles, weather events, and other powerful forces.
Easily confused with impact
Impact generally emphasizes a notable or significant effect, whereas affect is the broader verb meaning to influence or alter something.