a saddle horse trained for use in separating an individual animal, such as a cow, from a herd
cutting horse in American English
noun
a saddle horse trained to separate calves, steers, etc., from a herd
Word origin
[1880–85]This word is first recorded in the period 1880–85. Other words that entered Englishat around the same time include: Chief of Staff, highball, impressionism, rain check, regionalism