MODULATIONS
Noun
modulations
plural of modulation
Source: Wiktionary
MODULATION
Mod`u*la"tion, n. Etym: [L. modulatio: cf. F. modulation.]
1. The act of modulating, or the state of being modulated; as, the
modulation of the voice.
2. Sound modulated; melody. [R.] Thomson.
3. (Mus.)
Definition: A change of key, whether transient, or until the music becomes
established in the new key; a shifting of the tonality of a piece, so
that the harmonies all center upon a new keynote or tonic; the art of
transition out of the original key into one nearly related, and so
on, it may be, by successive changes, into a key quite remote. There
are also sudden and unprepared modulations.
Source: Webster’s Unabridged Dictionary 1913 Edition