Comedy (from the greek κωμωδία,komodia) has a popular meaning (any discourse generally intended to amuse, especially in television, film, and stand-up comedy). This must be carefully distinguished from its academic definition, namely the comic theatre, whose Western origins are found in Ancient Greece. In the Athenian democracy, the public opinion of voters was remarkably influenced by the political satire performed by the comic poets at the theaters.

The theatrical genre can be simply described as a dramatic performance which pits two societies against each other in an amusing agon or conflict. Northrop Frye famously depicted these two opposing sides as a "Society of Youth" and a "Society of the Old" (Anatomy of Criticism, 1957), but this dichotomy is seldom described as an entirely satisfactory explanation.

A later view characterizes the essential agon of comedy as a struggle between a relatively powerless youth and the societal conventions that pose obstacles to his hopes; in this sense, the youth is understood to be constrained by his lack of social authority, and is left with little choice but to take recourse to ruses which engender very dramatic irony which provokes laughter (Marteinson, 2006).

Much comedy contains variations on the elements of surprise, incongruity, conflict, repetitiveness, and the effect of opposite expectations, but there are many recognized genres of comedy. Satire and political satire use ironic comedy to portray persons or social institutions as ridiculous or corrupt, thus alienating their audience from the object of humor. Satire is a type of comedy.

Parody borrows the form of some popular genre, artwork, or text but uses certain ironic changes to critique that form from within (though not necessarily in a condemning way). Screwball comedy derives its humor largely from bizarre, surprising (and improbable) situations or characters. Black comedy is defined by dark humor that makes light of so called dark or evil elements in human nature. Similarly scatological humor, sexual humor, and race humor create comedy by violating social conventions or taboos in comedic ways.

A comedy of manners typically takes as its subject a particular part of society (usually upper class society) and uses humor to parody or satirize the behavior and mannerisms of its members. Romantic comedy is a popular genre that depicts burgeoning romance in humorous terms, and focuses on the foibles of those who are falling in love.

Etymology

The word "comedy" is derived from the Classical Greek κωμῳδία, which is a compound either of κῶμος (revel) or κώμη (village) and ᾠδή (singing): it is possible that κῶμος itself is derived from κώμη, and originally meant a village revel. The adjective "comic" (Greek κωμικός), which strictly means that which relates to comedy is, in modern usage, generally confined to the sense of "laughter-provoking".Francis MacDonald Cornford, The Origin of Attic Comedy, 1934. Of this, the word came into modern usage through the Latin comoedia and Italian commedia and has, over time, passed through various shades of meaning.Oxford English Dictionary