Woodswalker wrote:Oxford English Dictionary:
mountain - A large natural elevation of the earth's surface, esp. one high and steep in form (larger and higher than a hill) and with a summit of relatively small area.

Webster's Seventh New Collegiate Dictioinary:
mountain - a land mass that projects conspicuously above its surroundings and is higher than a hill.

surgent wrote:

Woodswalker wrote:Oxford English Dictionary:
mountain - A large natural elevation of the earth's surface, esp. one high and steep in form (larger and higher than a hill) and with a summit of relatively small area.

Webster's Seventh New Collegiate Dictioinary:
mountain - a land mass that projects conspicuously above its surroundings and is higher than a hill.

This begs the question, "what is a hill?". The answer, of course, is a land mass that projects conspicuously above its surroundings and is lower than a mountain.

"Mountain" will never be a well-defined term. There'd be no use trying, since any attempt at a definition would have compelling counter-arguments.