From The Collaborative International Dictionary of English v.0.48:
Canter \Can"ter\ (k[a^]n"t[~e]r), n. [An abbreviation of Canterbury. See Canterbury gallop, under Canterbury.] 1. A moderate and easy gallop adapted to pleasure riding. [1913 Webster]
Note: The canter is a thoroughly artificial pace, at first extremely tiring to the horse, and generally only to be produced in him by the restraint of a powerful bit, which compels him to throw a great part of his weight on his haunches . . . There is so great a variety in the mode adopted by different horses for performing the canter, that no single description will suffice, nor indeed is it easy . . . to define any one of them. --J. H. Walsh. [1913 Webster]
2. A rapid or easy passing over. [1913 Webster]
A rapid canter in the Times over all the topics. --Sir J. Stephen. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Canter \Can"ter\ (k[a^]n"t[~e]r), v. i. [imp. & p. p. Cantered (k[a^]n"t[~e]rd); p. pr. & vb. n. Cantering.] To move in a canter. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Canter \Can"ter\, v. t. To cause, as a horse, to go at a canter; to ride (a horse) at a canter. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Canter \Cant"er\, n. 1. One who cants or whines; a beggar. [1913 Webster]
2. One who makes hypocritical pretensions to goodness; one who uses canting language. [1913 Webster]
The day when he was a canter and a rebel. --Macaulay. [1913 Webster]