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the act of modulating or the condition of being modulated

music the transition from one key to another

grammar

1. another word for intonation

2. the grammatical expression of modality

electrical engineering

1. the act or process of superimposing the amplitude, frequency, phase, etc, of a wave or signal onto another wave (the carrier wave) or signal or onto an electron beam See also amplitude modulation frequency modulation phase modulation velocity modulation

2. the variation of the modulated signal