† suraˈdditionObs.rare. [See sur- and addition; cf. F. suraddition.] An additional name or title (see addition 4). 1611Shakes.Cymb. i. i. 33 His Father Was call'd Sicillius,..But had his Titles by Tenantius, whom He seru'd with Glory, and admir'd Successe; So gain'd the Sur-addition, Leonatus.