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Search also in: Web News Encyclopedia Images. opus (opuses plural) (opera plural) 1 n-count An opus is a piece of classical music by a particular composer. Opus is usually followed by a number which indicates at what point the piece was written. The abbreviation op. is also used.
Definition of Virgo for English Language Learners. : 1  the sixth sign of the zodiac that comes between Leo and Libra and that has a virgin as its symbol. : 2  a person born under the sign of Virgo : a person born between August 23 and September 22.