Electronic musical instruments (Topical Term)

New Grove dict. of mus. online, Feb. 15, 2002: Electronic instruments (Instruments that incorporate electronic circuitry as an integral part of the sound-generating system; common usage: the generic term for all instruments in which vibrations are amplified and heard as sound through a loudspeaker, whether the sound generating system is electroacoustic or electronic)

New Harvard dict. of mus.: Electronic instrument (an instrument in which the tone is produced and/or modified by electronic means; two broad classes, instruments in which the sound is generated by mechanical systems and modified electronically, instruments in which the sound is generated and produced entirely by electronic means)