Yaoi

from the phrase 'yama-nashi, ochi-nashi, imi-nashi', meaning 'no climax, no punchline, no meaning', playful stories of a nonsensical sort, often taking male characters from popular animation series and depicting them in gay relationships.
Found on http://www.ryouko.demon.co.uk/ANIGLOSS.HTM

Yaoi

A pornographic manga or anime containing a same sex love story between two men. Pronounced ‘yah-oh-ee`.
Found on http://www.animetion.co.uk/glossary.htm

Yaoi

As these depict males, there is an androphilic male audience as well, however manga aimed at a gay male audience is considered a separate genre. Originally referring to a specific type of dōjinshi (self-published works) parody of mainstream anime and manga works, yaoi came to be used as a generic term for female-oriented manga, anime, dating sims
Found on http://en.wikipedia.org/wiki/Yaoi

Yaoi

an anime/manga story in which the plot is centered around a romance relationship between two male characters, usually at least one of them being very effeminate. There is a good amount of yaoi in many actual anime/manga series' but yaoi is mostly seen in the world of anime fan art and fan fics, in which the fans (usually girls) take the male charac
Found on http://hubpages.com/hub/Anime-Dictionary

Yaoi

Genre of anime that involve homosexual males. Usually erotic.
Found on http://animeseed.com/index.php/anime-glossary

Yaoi

(ya-o-ee) Stories in anime or manga which focus on male homosexuality (not necessarily erotic in nature).
Found on http://www.animecritic.com/resources/glossary.html

yaoi

refers to male/male situations. The word 'yaoi' is an acronym 'yama nashi, ochi nashi, imi nashi', which means roughly "No climax, no point, no meaning". In general, the yaoi genre tends to focus on sexual or comedic themes and not so much on the relationship or emotional aspects, and often uses existing characters (like in doujinshi). Many western
Found on http://sarcasm-hime.net/fanboys/glossary.html
No exact match found