n.

1. 【海】三眼轆轤
2. 【俚】神槍手

a.

1. 〔口〕瞄準精準的
   The soldier was a deadeye shooter.

   那位軍人是個神準的射手。

2. 〔口〕冷淡的
   The deadeye waiter ignored our attempts to gain his attention.

   那位冷淡的服務生忽視我們嘗試引起他的注意。

n.

1. Sailing  a circular wooden block with a groove round the circumference to take a lanyard, used singly or in pairs to tighten a shroud.
2. informal, chiefly N. Amer. an expert marksman.