Opus (PL: opera) is a Latin word meaning "work". Italian equivalents are opera (singular) and opere (plural).
Opus or OPUS may refer to:

Arts and entertainment
Music
Opus number, (abbr. Op.) specifying order of (usually) publication, and hence applied to collections as well as individual compositions
OPUS Records, a Slovak record label
Opus 111, a French classical record label bought by Naive

Bands
Opus (Austrian band), an Austrian pop-rock group
Opus (Yugoslav band), a former Yugoslav progressive rock group
Opus III (band), an English electronic pop group
Pur (band), a German pop group originally known as "Opus"

Albums
Opus (Opus album), 1987 album by Austrian band Opus
Opus (Schiller album), 2013 album by German music project Schiller
Opus, a 2014 album by Jane Badler
Opus (Eric Prydz album), 2016 album by the electronic artist Eric Prydz
"Opus" (Eric Prydz song), song from the eponymous album.
Opus, a 2007 compilation album by Mr. Sam
Opus 1 (album), 1975 album by the Yugoslav band Opus
 Opus (Marc Anthony album), 2019 album by Puerto Rican singer Marc Anthony

Publications
Opus (comic strip), by Berkeley Breathed
Opus the Penguin, the title character of the strip, originally from Bloom County
Opus (manga), a manga by Satoshi Kon
Opus (University of Newcastle magazine), a student newspaper of the University of Newcastle, Australia
Opus (classical record magazine), an American magazine

Other arts
Opus (play), a 2006 play by Michael Hollinger
Opus the Penguin, a character in the comic strip Bloom County
Work of art (L. opus)
Magnum opus or masterwork

Computing
Opus (audio format), an audio coding format
Opus (microkernel), an operating system kernel
Opus-CBCS, a computer bulletin board system
Directory Opus, a file manager program
OPUS (software), digital repository software

Organisations
Opus Group Berhad, a consortium of several different companies operating under the Opus brand name
Opus Energy, an electricity and gas supplier based in the United Kingdom
Opus College of Business, United States

Transportation
OPUS card, a card used for public transit in Quebec, Canada
Opus, a bus manufactured by Optima Bus Corporation

Other uses
Opus (mythology), a son of Zeus
Opus, Greece, a city in ancient Locris, Greece
Opus (Elis), a town in ancient Elis, Greece
Opus (architecture), a series of constructing methods in use in Ancient Rome
Opus pontis, cost of paying for bridge work in Ancient Rome and the Roman Empire
OPUS (chromatography), a line of chromatography columns manufactured by Repligen Corporation

See also
Mr. Holland's Opus, a 1995 film starring Richard Dreyfuss
Magnum opus (disambiguation)
Opera (disambiguation) (plural form of opus)
Opus Dei (disambiguation)
All pages with titles beginning with Opus
All pages with titles containing Opus