ETYM Old Eng. mountaine, montaine, French montagne, Late Lat. montanea, montania, from Latin mons, montis, a mountain; cf. montanus belonging to a mountain. Related to Mount.
A land mass that projects well above its surroundings; higher than a hill; SYN. mount.
Natural upward projection of the Earth's surface, higher and steeper than a hill. The process of mountain building (orogeny) consists of volcanism, folding, faulting, and thrusting, resulting from the collision and welding together of two tectonic plates (see plate tectonics). This process deforms the rock and compresses the sediment between the two plates into mountain chains.