noun

• (literary or old-fashioned) Christmas.
• A male given name from French.
• A female given name from French.
• A surname originating as a patronymic.
• A city in Missouri.
• A community in Nova Scotia, Canada.
• A kind of hymn, or canticle, of mediaeval origin, sung in honor of the birth of Christ; a Christmas carol.
• Acronym of no observed effect level.