Golf Widow Meaning

Example : 1900 Aug. 12, "Women Here and There," New York Times, p. 15:  It is claimed that the next best thing a golf widow can do if she cannot fill her lonely hours with croquet is to assume a devout interest in her husband's game.2003 Oct. 6, Tessa Boase, "In search of the best spas," The Telegraph (UK) (retrieved 14 Dec 2008):  "It's about being a golf widow," shrugged Rita. "What do women do when their husbands are playing golf?"