Meaning of MODULATION in English

[] n (1531) 1: a regulating according to measure or proportion: tempering

2: an inflection of the tone or pitch of the voice; specif: the use of stress or pitch to convey meaning

3: a change from one musical key to another by modulating

4: the process of modulating a carrier or signal (as in radio); also: the result of this process

Merriam-Webster English vocab.      Английский словарь Merriam Webster.