Ramadan \Ram`a*dan"\, n. [Ar. ramad[=a]n, or ramaz[=a]n, properly, the hot month.] [Written also {Ramadhan}, {Ramadzan}, and {Rhamadan}.] 1. The ninth Mohammedan month. 2. The great annual fast of the Mohammedans, kept during daylight through the ninth month.