Serenity, an absence of agitation. See Peace. Serenity may also refer to: In fiction:

In Joss Whedon's Firefly:

Serenity (film), a 2005 science fiction space western film

Princess Serenity, the protagonist and title character of the metaseries known as Sailor Moon

Serenity (Firefly vessel), a fictional spaceship

"Serenity" (Firefly episode), the original two-hour series pilot

Serenity: Those Left Behind, a 2005 three-issue comic book miniseries

Serenity Rose, the protagonist of the comic of the same name

Serenity Prayer

Serenity (role-playing game), a science fiction role-playing game

Serenity Wheeler, a character from Yu-Gi-Oh!

Serenity(winterguard), a winterguard group currently competing in WGUK

Serenity (Culture Beat album), the second album by Culture Beat

Serenity (soundtrack), the soundtrack to the film

Serenity (porn star), an adult video actress

Serenity (band), an Austrian Progressive metal band

Crystal Serenity, a cruise ship for Crystal Cruises

Serenity (Blood for Blood album), the seventh studio album by Blood for Blood

Serenity (software), an open source web server project

Serenity (song), a hard rock song by Godsmack

Passaddhi (Pali) - Buddhist enlightenment factor.