chamber music, Kammermusik [G], Musique de chambre [F], Musica da camera [I]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players
continuo, basso continuo, b.c., figured bass, thorough bass, basse chifrée—During the Baroque Era, a term for an improvised (realized) instrumental accompaniment specified by a symbolic notation for chords and a written bass line (i.e. figured bass). A continuo "part" usually implies multiple (but typically unspecified) instruments, e.g. one for a strong bass line (e.g. cello) and another for chords (e.g. lute, keyboard, organ). A continuo part may be realized by keyboard alone, and sometimes played by a bass melody instrument alone (without harmonies). wiki
sonata, sonate, suonato—a complicated term. Originally, "sounded" rather than "sung" (sonar vs. cantar), e.g. instrumental music. According to historical period, sonata began to imply a formal plan of movements as well as the structure within a single movement, e.g. sonata form. In general usage as a work title, it designates a multi-movement piece for solo or duo instruments with one of the instruments enjoying a feature role.
with thinking heart and feeling mind, I'll embody your muse, thy soul divine