mountainy adjective2 •(Ireland) Mountainous.His girl, who worked on a mountainy farm above Caerphilly, had written to him about a queer cow […]. — 1925 •(Ireland) native to mountainous territory; rustic, backwardThe mountainy children looked at the untidy village women with surprise and the village women looked back with that certain disdain which villagers have for poor mountainy people. — 1960 formsmore mountainy · most mountainy