:For the NASCAR Driver nicknamed The Onion, see Todd Bodine.

The Onion is a United States-based parody newspaper published weekly in print and daily online. It features satirical articles reporting on international, national, and local news as well as an entertainment newspaper and website known as The A.V. Club. It claims a national print circulation of 710,000 and says 67 percent of its Web site viewers are between 18 and 44 years old.

The Onion ' s articles comment on current events, both real and imagined. It parodies traditional newspaper features, such as editorials, man-on-the-street interviews, and stock quotes, as well as traditional newspaper layout and AP-style editorial voice. Much of its humor depends on presenting everyday events as newsworthy items, and by playing off of commonly used phrases such as the headline "Drugs Win Drug War."

A second part of the newspaper is a non-satirical entertainment section called The A.V. Club that features interviews and reviews of various newly-released media, and other weekly features. The print edition also contains restaurant reviews and previews of upcoming live entertainment specific to cities where a print edition is published. The online incarnation of The A.V. Club has its own domain, includes its own regular features (including the syndicated weekly sex advice column Savage Love), A.V. Club blogs and reader forums, and presents itself as a separate entity from The Onion itself.

The English lexicographer and grammarian is at Charles Talbut Onions. Many plants in the genus Allium are known by the common name onion but, used without qualifiers, it usually refers to Allium cepa. Allium cepa is also known as the 'garden onion' or 'bulb' onion and 'shallot'.

.onion is a pseudo-top-level domain address suffix (similar in concept to such endings as .bitnet and .uucp used in earlier times) designating an anonymous hidden service reachable via the Tor network. Such addresses are not actual DNS names, and the .onion TLD is not in the Internet DNS root, but with the appropriate proxy software installed, Internet programs such as Web browsers can access sites with .onion addresses by sending the request through the network of Tor servers. The purpose of using such a system is to make both the information provider and the person accessing the information more difficult to trace, whether by one another, by an intermediate network host, or by an outsider.

Addresses in the .onion pseudo-TLD are opaque, non-meaningful strings which are automatically generated based on a public key when a hidden service is configured.

The "onion" name refers to onion routing, the technique used by Tor to achieve a degree of anonymity.

A list of .onion hosts can be found here; Tor, Central Sites.