The fashionable lady beside me was looking expectantly at Monseigneur C——.
Monseigneur C—— delivered his text in a calm voice, glancing quietly over the congregation.
c.1600, from French monseigneur (12c.), title of honor equivalent to "my lord," from mon "my" (from Latin meum) + seigneur "lord," from Latin seniorem, accusative of senior "older" (see senior (adj.)). Plural messeigneurs.