A meme is an idea, behavior, or style that spreads by means of imitation from person to person within a culture and often carries symbolic meaning representing a particular phenomenon or theme. A meme acts as a unit for carrying cultural ideas, symbols, or practices, that can be transmitted from one mind to another through writing, speech, gestures, rituals, or other imitable phenomena with a mimicked theme. Supporters of the concept regard memes as cultural analogues to genes in that they self-replicate, mutate, and respond to selective pressures. In popular language, a meme may refer to an Internet meme, typically an image, that is remixed, copied, and circulated in a shared cultural experience online.

An Internet meme, or simply meme, is a cultural item that is spread via the Internet, often through social media platforms. Internet memes can take various forms, such as images, videos, GIFs, and various other viral sensations. Characteristics of memes include their susceptibility to parody, their use of intertextuality, their propagation in a viral pattern, and their evolution over time. The name is from the concept of memes proposed by Richard Dawkins in 1972.