opus

noun

ˈō-pəs 

plural opera ˈō-pə-rə  ˈä-  also opuses ˈō-pə-səz 

: work entry 2 sense 3b

… produced a vast opus on the history of civilization.

—Norman Cousins

At present he is planning the Pumpkins' next release, a double-album opus that is bound to delight the fans who snatched up his band's last release …

—Chris Mundy

especially : a musical composition or set of compositions usually numbered in the order of its issue

the composer's first opus

"… opus numbers are meant to indicate the chronological order of musical pieces, although sometimes they indicate the order of publication rather than the exact order of composition. Sometimes it's actually scholars who make chronological catalogs long after the composers have died. …"

—Miles Hoffman

Did you know?

A literary opus is often a single novel, though the word may sometimes refer to all of a writer's works. But opus normally is used for musical works. Mendelssohn's Opus 90 is his Italian Symphony, for example, and Brahms's Op. 77 is his Violin Concerto. Since many composers' works were never given opus numbers in an orderly way, they now often have catalog numbers assigned by later scholars. So Haydn's Symphony No. 104 is Hob.104 (Hob. is short for Anthony van Hoboken, the cataloger), and Mozart's Marriage of Figaro is K.492 (K. stands for Ludwig Köchel).

Synonyms of opus

• composition
• piece
• work
• masterpiece

Examples of opus in a Sentence

the composer's final opus was performed posthumously to great acclaim

Recent Examples on the Web

Josh Safdie’s table-tennis opus Marty Supreme picked up three nominations, but none for the score by Oneohtrix Point Never’s Daniel Lopatin. —Jazz Monroe, Pitchfork, 8 Dec. 2025

Guillermo del Toro’s latest opus is, in many ways, about birth. —Ethan Shanfeld, Variety, 5 Dec. 2025

This vibrant opus celebrates Puerto Rican rhythms by bridging reggaeton and Latin trap with the acoustic sounds of previous generations, like salsa, plena, bolero, and perreo. —Jenn Pelly, Time, 4 Dec. 2025

Across six seasons, Dan Fogelman’s family opus garnered 39 Emmy nominations, four wins, and two Screen Actors Guild awards. —Maggie Fremont, Entertainment Weekly, 28 Nov. 2025

Word History

Etymology

borrowed from Latin oper-, opus (plural opera) "work, effort, product of labor, work of art," going back to Indo-European *h₃ep-os-, *h₃ep-es- "work" (whence also Sanskrit apas- "work, action"), derivative of *h₃ep- "ability, force," whence Latin op-, *ops "power, ability, wealth, resource(s)," and, with varying suffixation, Sanskrit apnas- "possession, property, work," Hittite happina- "rich," happir-, happar- "business, trade," Germanic *afla- (whence Old English afol "power, might," Old Norse afl "strength"); and, with lengthened ablaut grade, Sanskrit āpas- "work, religious act," Avestan huuāpah- "performing good deeds," Germanic *ōbjan- "to perform" (whence Old Saxon oƀian "to celebrate," Old High German uoben, uoppen "to practice, exercise")

Note: Possibly also related are Old Norse efna "to perform, fulfill," Old English efnan "to accomplish, achieve" (from Germanic *abnjan-?), but this is uncertain.

First Known Use

1808, in the meaning defined above

Phrases Containing opus

• magnum opus

Rhymes for opus

• hopis
• scopus
• lagopus
• rhizopus

Kids Definition

opus

noun

ˈō-pəs 

plural opera

ˈō-pə-rə, 

ˈäp-ə-

also opuses ˈō-pə-səz 

: work entry 1 sense 7

especially : a musical composition or set of compositions