Definitions for prairial
ninth month of the Revolutionary calendar (May and June); the month of meadows
The ninth month of the French Republican Calendar, from May 20 or 21 to June 19 or 20.
Origin: From prairie (pasture)
the ninth month of the French Republican calendar, which dated from September 22, 1792. It began May, 20, and ended June 18. See Vendemiaire