a silky-coated sheepdog with a long ruff and long narrow head developed in Scotland
"The farmer proudly showed off his prize-winning collie, admiring its distinctive long ruff and narrow head."
Any of various breeds of dog originating in Scotland and England as sheepdogs
"The golden collie herded the flock into the barn just before dinner."
A surname.
"The Collie family has lived on this farm for three generations, keeping a close eye on their sheep from the old house at the top of the hill."