Cockbill \Cock"bill\ (k[o^]k"b[i^]l`), v. t. [See {Cock} to set erect.] (Naut.) To tilt up one end of so as to make almost vertical; as, to cockbill the yards as a sign of mourning. {To cockbill the anchor}, to suspend it from the cathead preparatory to letting it go. See {Acockbill}.