saddlesore Syllabification: (sad·dle·sore)Pronunciation: /ˈsadlˌsôr/Definition of saddlesore noun a bruise or sore on a horse’s back, caused by pressure or chafing of an ill-fitting saddle. adjective (of a person) chafed from riding on a saddle. saddlesore in other Oxford dictionaries Definition of saddlesore in the British & World English dictionary