A meme (/miːm/ MEEM) is an idea, behavior, or style that spreads from person to person within a culture—often with the aim of conveying a particular phenomenon, theme, or meaning represented by the meme. 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.
A 'meme' is a virally-transmitted cultural symbol or social idea.
The majority of modern memes are captioned photos that are intended to be funny, often as a way to publicly ridicule human behavior. Other memes can be videos and verbal expressions. Some memes have heavier and more philosophical content.
The world of memes (which rhymes with 'teams') is noteworthy for two reasons: it is a worldwide social phenomenon, and memes behave like a mass of infectious flu and cold viruses, traveling from person to person quickly through social media.
According to Cecil Adams of theStraightDope.com, the concept of memes "is either really deep or really, really obvious."
We need a name for the new replicator, a noun that conveys the idea of a unit of cultural transmission, or a unit of imitation. 'Mimeme' comes from a suitable Greek root, but I want a monosyllable that sounds a bit like 'gene'. I hope my classicist friends will forgive me if I abbreviate mimeme to meme. If it is any consolation, it could alternatively be thought of as being related to 'memory', or to the French word même. It should be pronounced to rhyme with 'cream'.