The Collaborative International Dictionary of English v.0.48:
Collie \Col"lie\ (k[o^]l"l[y^]), n. [Gael. cuilean whelp, puppy,
The Scotch shepherd dog. There are two breeds, the
rough-haired and smooth-haired. It is remarkable for its
intelligence, displayed especially in caring for flocks.
[Written also colly, colley.]