Noun

Singular impact

Plural impacts

impact (plural impacts)

1. The force or energy of a collision of two objects.

   The hatchet cut the wood on impact.

2. (mainly medicine) A forced impinging.

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

3. A significant or strong influence; an effect.

   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.

Derived terms

• impactful

• impactive

Impact, in general, can refer to the influence or effect of an object. In science, however, it can refer to the collision of two objects. In medicine, it can refer to impinge.

Impact can also refer to:

In computing:

• IMPACT (computer graphics), a computer graphics architecture for Silicon Graphics computer workstations
• Impact Finite Element Program, an open source finite element program
• Impact, a 1988 computer game published by Audiogenic
• Impact (cyber security), the International Multilateral Partnership Against Cyber-Terrorism (Impact)

In science:

• Impact event, the collision of a meteoroid, asteroid or comet with Earth
• Impact crater, a meteor crater caused by an impact event
• Impact factor, a measure of the citations to a science or social science journal
• Impact (mechanics), a high force or shock (mechanics) over a short time period

In film, television, and radio:

• Impact (1949 film), a 1949 film noir starring Brian Donlevy and Ella Raines
• Impact, a 1987 talk radio program hosted by Frank Sontag
• TNA Impact!, a professional wrestling television program
• Impact (2009 TV mini-series), a 2009 television mini-series starring Natasha Henstridge and David James Elliott

In literature:

• Impact (action entertainment magazine), a monthly action entertainment magazine that focus on Asian action cinema and anime.
• Impact (student magazine), a student magazine for the University of Nottingham, England
• Student Impact, the student newspaper for the University of Bath, England
• Impact Press, an Orlando, Florida-based magazine
• Impact Comics, a DC Comics imprint
• Impact (EC Comics), a 1955 EC Comics comic book
• Impact (Image Comics), an Image Comics comic book character

In music:

• Impact, a short-lived disco group formed in the mid-70s by Damon Harris
• Impact Records, an American record label

Organizations

• IMPACT, a charitable organization focusing on public and preventative interventions to stop preventable disability.
• Impact! Miniatures, a company producing 28mm wargaming figures.
• Irish Municipal, Public and Civil Trade Union known as IMPACT

In sports:

• Impact United Soccer Club, a North American soccer league.

Other:

• Impact Networking, document imaging company
• Impact, prototype for the General Motors EV1 electric car
• Montreal Impact, a soccer team in the North American USL First Division
• Impact (typeface), a sans-serif typeface
• Impact, or Model Mugging, a form of women's self-defense
• Impact, Texas, a town in Taylor County, Texas, USA