n. a group of riders on well-trained horses who perform in processions, at fairs or stampedes, etc., usually for some charity.
- 1958  The Jasper Rodeo . . . program includes the Edmonton Sheriff's Posse musical ride. . . .
- 1961  Adding to the show was the Edmonton posse, comprising 16 matched palomino horses. . . . The posse also gave performances Saturday and Sunday and was greatly enjoyed by the large crowd.