Influence

Influence may refer to:

Social influence, in social psychology, influence in interpersonal relationships
- Minority influence, when the minority affect the behavior or beliefs of the majority

Science and technology

Sphere of influence (astrodynamics), the region around a celestial body in which it is the primary gravitational influence on orbiting objects
Sphere of influence (black hole), a region around a black hole in which the gravity of the black hole dominates that of the host galaxy's bulge

Undue influence, in contract law, where one person takes advantage of a position of power over another person
Sphere of influence, in political science, an area over which a state or organization has some indirect control
Agent of influence, an agent of some stature who uses his or her position to influence public opinion or decision making to produce results beneficial to the country whose intelligence service operates the agent
Office of Strategic Influence, a short-lived U.S. government department
Driving under the influence, the criminal act of driving while intoxicated
Influence: Science and Practice, or Influence: The Psychology of Persuasion; two books by Robert Cialdini