Entry 1 sense Webster, 1913 Buccinator · Buc·ci·na·tor · IPA /ˈbʌk.səˌneɪ.tɚ/ 01 n. A muscle of the cheek; -- so called from its use in blowing wind instruments. 1. A muscle of the cheek; -- so called from its use in blowing wind instruments.(Anat.)