hornful|ˈhɔːnfʊl| [f. horn n. + -ful.] As much as a (drinking) horn holds, or will hold. 1610Markham Masterp. i. xli. 86 Giue it the horse to drinke, one horne-ful at his mouth, and another at his nosthrels.1868Baker Cast up by Sea iii. 48 He poured out a large hornful for the lad.