PIANO (2)

{ Pi‐an″o (?), Pi‐an″o‐for′te (?), } n. [[It. piano soft (fr. L. planus even, smooth; see Plain, a.) + It. forte strong, fr. L. fortis (see Fort).]] (Mus.) A well-known musical instrument somewhat resembling the harpsichord, and consisting of a series of wires of graduated length, thickness, and tension, struck by hammers moved by keys. Dumb piano. See Digitorium. — Grand piano. See under Grand. — Square piano, one with a horizontal frame and an oblong case. — Upright piano, one with an upright frame and vertical wires.