(mathematics, physics) oscillating motion (as of a pendulum) in which the acceleration of the oscillator has an equal magnitude but opposite direction to the displacement of it from the equilibrium position

(Greek mythology) The goddess of harmony and concord, and the daughter of Ares and Aphrodite. Her Roman counterpart is Concordia. / (astronomy) 40 Harmonia, a main belt asteroid.

(intransitive) To be in harmonious agreement. / (intransitive, music) To play or sing in harmony. / (transitive, music) To provide parts to.

(British spelling) Alternative spelling of harmonization

An instrument used to measure the amplitudes, frequencies and phases of the components of a nonsinusoidal waveform; especially one used for analyzing audio frequencies.

pertaining to harmony / pleasant to hear; harmonious; melodious / (mathematics) used to characterize various mathematical entities or relationships supposed to bear some resemblance to musical consonance

(physics) A component frequency of the signal of a wave that is an integer multiple of the fundamental frequency.

(dated, music) The harmonica. / (historical) An acoustic apparatus that produces a musical note when a long dry tube, open at both ends, is held over a jet of burning hydrogen.

(mathematics) A type of measure of central tendency calculated as the reciprocal of the mean of the reciprocals, ie, H=n/1/x_1+1/x_2+⋯+1/x_n

(music) A small keyboard instrument that consists of a series of reed pipes, which sound when one of the keys is pressed to open a valve that allows air to pass through.