/kan"yeuhn/ , n.
a deep valley with steep sides, often with a stream flowing through it.
Also, cañon .
[ 1835-45, Amer.; cañón a long tube, a hollow, equiv. to cañ ( a ) tube ( canna CANE) + -on aug. suffix ]
Syn . gorge, gully, ravine, pass, gap, arroyo, coulee.