1. frimaire - Noun
2. Frimaire - Proper noun
The third month of the French republican calendar. It commenced November 21, and ended December 20., See Vendemiaire.
Source: Webster's dictionaryThe French Republic ended with the coronation of Napoleon I as Empereur des Français (Emperor of the French) on 11 Frimaire, Year XIII (2 December 1804), a little more than a year before the calendar did. Source: Internet