in sing.
1- a pace of a horse or other quadruped between a trot and a gallop, with not less than one foot on the ground at any time（马或其他四足动物的）慢跑, 小跑：
he kicked his horse into a canter
他踢马, 让它慢跑
I rode away at a canter.
我骑马小跑而去。
1.1
- a ride on a horse at such a speed骑马慢跑：
we came back from one of our canters.
我们骑马慢跑回来。
no obj., with adverbial of direction
1- (of a horse) move at a canter in a particular direction（马）慢跑, 小跑：
they cantered down into the village.
他们骑马慢跑进入村庄。
1.1
- with obj. make (a horse) move at a canter使（马）慢跑：
Katharine cantered Benji in a smaller and smaller circle.
凯瑟琳让本基慢跑着, 转着越来越小的圈子。
短语
in（或at）a canter
- Brit. without much effort; easily〈英〉不费力地; 容易地：
they retained their leadership of the Second Division at a canter.
他们在第二分组轻松地保持领先地位。
词源
early 18th cent. (as a verb)： short for Canterbury pace or Canterbury gallop, from the supposed easy pace of medieval pilgrims to CANTERBURY.