(Originally) a gazelle frequenting mountainous country; (later) specifically the small Gazella gazella, now confined to semidesert and scrub in the Arabian peninsula (also called idmi).
Origin
Mid 19th century.
Definition of mountain gazelle in US English:
mountain gazelle
noun
(Originally) a gazelle frequenting mountainous country; (later) specifically the small Gazella gazella, now confined to semidesert and scrub in the Arabian peninsula (also called idmi).