cadenza [I]—a solo, typically near the end of a movement, showing brilliant, virtuosic and improvisatory expression. An apotheosis. Related to "cadence" and "close". Usually found within concertos.
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
fantastico [I]—fantastic, whimsical, capricious; in the manner of a fantasy
finale [I], final [F]—The final movement, sometimes explicitly titled thus
introduzione—introduction
nocturne [F], notturno [I], nocturno, Nachtstück [G]—Night music. A romantic character piece depicting moods of the evening or night: quiet, reflective, perhaps romance and melancholy or even restlessness and fantasy. The most famous nocturnes come originally from the piano literature, e.g. John Field and Chopin, et. al.
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
piano quintet—ensemble (work) for string quartet plus piano. One of the most grand chamber music forms. For an extra rich sound, some piano quintets omit the 2nd violin and add a bass comprising the complete four-part string section of the orchestra.
quintet, quintette [F], quintett [G], quintetto [I]—an ensemble / work for 5 players, the typical examples being string quintet (with second viola or cello), piano quintet or woodwind quintet
scherzo—lively, brisk, typically in a triple meter; usually a three-part form with central, contrasting trio