marquise (plural marquises)

1. (chiefly, historical) A marchioness, especially one who is French.

   Synonyms: marchioness

2. A marquee.
3. (jewelry) An oval cut diamond with pointed ends.
4. (architecture) A canopy, usually of glass, set as a shelter over a door opening onto a terrace or pavement.
   • 1907, Robert William Chambers, chapter I, in The Younger Set, New York, N.Y.: D. Appleton & Company, OCLC 24962326 ↗:

     The house was a big elaborate limestone affair, evidently new. Winter sunshine sparkled on lace-hung casement, on glass marquise, and the burnished bronze foliations of grille and door.

5. (historical) A style of parasol of the mid-19th century.
6. (cooking) A rich dessert made with dark chocolate, butter, sugar, cocoa powder, eggs and cream.