allegretto—moderately quick tempo. slower than allegro but faster than andante
allegro [I]—fast, lively tempo. From the Italian word for cheerful or gay.
chamber music, Kammermusik [G], musique de chambre [F], musica da camera [I], musica cameralis [L]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players. explore
duo, duet, dueto [S], duetto [I], duett [G]—a work for two instruments; the ensemble itself
fantasia, fantasy, fantazy, fantazia, phantasy, phantasie, fancy, fantasie [G], fantaisie [F] —generally, a piece of music favoring a free flight of expression over strict adherence to formal rules; suggesting an improvisational character. However, there are at least two more specific historical meanings: 1) the fantasia/fantasie/fancy of English Renaissance viol consort music and 2) Cobbett's Phantasie, an early 20th century form of single-movement chamber music inspired by the Renaissance fancy with the goal of stimulating new English chamber or "consort" music.
moderato [I], moderamente, modéré [F], modérément [F]—moderately, at a moderate tempo, applying a touch of restraint to its related word(s), e.g. allegro moderato
opus [L], opera[pl], Op., Opp, WoO, Op. posth—work, as in a work of art. For unique identification, publishers/composers often assign an "opus number", abbreviated as "Op." (e.g. Op. 1). A range of works by opus number, uses the plural "opp." (e.g. "Opp. 1-3"). A single opus number may refer to a collection of works (e.g. a set of quartets) giving rise to designations like "Op. 1, No. 4". For misc. works without opus numbers, "WoO" is often used (e.g."Without Opus"). Posthumously assigned numbers may use "Op. posth". Opus numbers may not precisely reflect chronology (publication vs. composition), can be erroneous, sparse or duplicative. Thus, the works of some historically important composers may use separate catalog numbers (e.g. Bach, Haydn, Schubert). See wiki
piece, pièce [F], stück [G], stücke [pl], pezzo [I], pezzi[pl]—a single-movement, self-sufficient musical work. Often used for short, individual works in a set or simply to indicate brevity without a titular suggestion of form or character.Chiefly contrasted with the term "movement", a piece which is an integral part of a larger whole without which it would be incomplete.
troppo [I], non troppo, trop [F]—too, too much. non troppo means "not too much". e.g. "Allegro ma non troppo" means fast, but not too much