Definition of "Yacht"
I agree with the definition of Jeff H. For over 20 years, the definition I have seen used by sailing texts has been, simply, "any pleasure boat." But, dictionary definitions change. Contemporary definitions, which are compiled by linguists, rather than by sailors, seem to suggest that small pleasure boats are not yachts. I think that is an elitist distinction that most sailors would find repugnant. I prefer to think that all pleasure boats are yachts, and if I want to distinguish them, size-wise, I can refer to them as small yachts, medium-sized yachts, and large yachts. If any linguists are tuned into the forum, leave our nautical lingo alone. It might seem antiquated to you, but we like it just as it is.