counterfort noun2 •A buttress built against a wall.This involved new track drainage, strengthening of embankments and cuttings and the provision of counterforts. — 1957 •A spur of a mountain range.The physical impossibility of the line along the counterfort or mountain range from Punta Mona was easily demonstrated, for the very simple reason that no such counterfort or mountain range existed. — 1913 formscounterforts