locution

noun4

1. •
   A phrase or expression peculiar to or characteristic of a given person or group of people.

   • The television show host is widely recognized for his all-too-common locutions.
2. •
   The use of a word or phrase in an unusual or specialized way.

   • So it cannot be supposed that promisings differ from other word-givings in that a word-giver makes a promise only if he or she uses the locution "I promise". — 1992
3. •
   Style of discourse or usage, or any particular utterance in such style.
4. •
   A supernatural revelation where a religious figure, statue or icon speaks, usually to a saint.