- Cornish or Rock Cornish (hens) [kôr′nish]adj.of Cornwall or its people, language, or culturen.1. the Celtic language spoken in Cornwall until c. 1800, closely related to Breton and Welsh2. pl. Cornisha) any of a British breed of chicken with meat of a particularly good qualityb) any of a breed of miniature chicken crossbred from a Cornish chicken and a Plymouth Rock chicken: popularly called Cornish hen
English World dictionary. V. Neufeldt. 2014.