Modulate

Modulate, mod′ū-lāt, v.t. to measure, to regulate: to vary the tone of voice so as to give expression: (mus.) to change the key or mode.—v.i. to pass from one key into another.—adj. Mod′ular, of or pertaining to mode or modulation, or to a module.—ns. Modulā′tion, the act of modulating: state of being modulated: (mus.) the changing of the keynote and of the original scale by the introduction of a new sharp or flat; Mod′ulātor, one who, or that which, modulates: a chart in the Tonic Sol-fa musical notation on which the modulations or changes from one scale to another are shown by the relative position of the notes; Mod′ule, a small measure or quantity: (archit.) a measure such as the diameter of the shaft for regulating the proportions of the other parts of columns: (Shak.) a model, image; Mod′ulus (math.), a constant multiplier in a function of a variable, by which the function is adapted to a particular base:—pl. Moduli (mod′ū-lī). [L. modulāri, -ātus—modulus, dim. of modus, a measure.]