Pronunciation: (moj"u-lā'shun, mod"yu-),[key] —n. 1. the act of modulating.
2. the state of being modulated.
3. Music.transition from one key to another.
4. Gram. a. the use of a particular distribution of stress or pitch in a construction, as the use of rising pitch on here in John is here? b. the feature of a construction resulting from such use.