Entry 2 senses · 2 variants Webster, 1913 Masthead /măs'-thĕdˌ/ · Mast·head · IPA /mˈæsthˌɛd/ n. v. t. 01 n. The top or head of a mast; the part of a mast above the hounds. 1. The top or head of a mast; the part of a mast above the hounds.(Naut.) 02 v. t. To cause to go to the masthead as a punishment. 1. To cause to go to the masthead as a punishment.(Naut.)