adagio [It]—slow tempo, often implying a lyrical, poignant character
allegretto—moderately quick tempo. slower than allegro but faster than andante
andante [I]—moderately slow tempo (e.g. walking). Faster than adagio but slower than allegretto
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
etude, étude [F]—instrumental music, typically for a soloist, that explores a particular technical feature as a demanding exercise ranging from pedagogical to virtuoso showcase. Many etudes are musical milestones of fine art
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.
giusto—just, right, strict, exact, true
leggiero, leggero, con leggerezza, léger [F], légèrement, avec légèreté—lightly, nimbly, quick, graceful
maestoso—With dignity and nobility; majestic
possible—capable; often used to modify a direction, e.g. "allegro possible", as "allegro" as possible
presto—very fast, more so than allegro.
tempo, tempi [pl]—speed or pace at which music progresses. Traditional classic music typically uses standard Italian words to designate the tempo, e.g. Allegro or adagio. Metronome markings provide precise numerical speeds. Tempo selection during performance is a complex artistic choice informed by composer's markings, performance tradition, technical limitations and interpretation.