1. (Fr. tonalité; Ger. Tonalität, Tonart; It. tonalità; Sp. tonalidad). The series of TONES forming any given MAJOR or MINOR SCALE, with reference to their harmonic relations, particularly the relation of the other tones to the TONIC or keynote.

Chromatic key, one having SHARPS or FLATS in the signature; extreme key, a remote key; major key, one having a major THIRD and SIXTH; minor key, one having a minor third and sixth; natural key, one with neither sharps nor flats in the signature; parallel key, either a minor key with the same keynote as a given major key, or vice versa; remote key, an indirectly related key.

2. (Lat. clavis; Fr. touche; Ger. Taste; It. tasto; Sp. tecla; Russ. klavisha). A finger lever in the keyboard of a PIANO or ORGAN, traditionally covered with ivory. Also, a pedal or foot key in the organ or pedal piano. 3. (Fr., clef; Ger., Klappe; It., chiave; Sp., llave). A flat padded disk attached to a lever worked by the finger or thumb, closing the sound holes of various wind instruments. 4. A tuning wrench.