deadeye /ˈdɛdaɪ/noun 3adjective 2forms 1 noun3 •A very accurate marksman.He taught both my mother and me to shoot, taught my mother so well that she became a better shot than he was--a real deadeye. — 1989 •A penchant for noticing a particular thing, or a person who has such a penchant.He examined the cash balance daily, boasted he could pay off all debts in two hours, had a deadeye for fake figures in scanning a ledger, and personally audited the books each New Year's Day. — 1990 •A wooden disk having holes through which the lanyard is passed, used for tightening shrouds. adjective2 •Very accurate in shooting or throwing.Gross, only a 20-year-old junior, is a deadeye passer, a poised runner and a quick-thinking field general. — 1961 •Cold; unfriendly.The deadeye stare of the bassist was enough to make any normal person run. — 2004 formsdeadeyes