Definition of terce in English:

terce

Pronunciation /tərs/

noun

  • A service forming part of the Divine Office of the Western Christian Church, traditionally said (or chanted) at the third hour of the day (i.e. 9 a.m.).

    • ‘The Order of Service for Noonday may be used (with appropriate choices from the options for lessons and collects) for terce, sext, or none.’

Origin

Late Middle English from Old French, from Latin tertia, feminine of tertius ‘third’. Compare with tierce.