Exact historical dictionary sense
Captain in Webster's 1913 dictionary
The 1913 record labels captain as noun. Its source-bounded etymology and selected historical definition appear below.
[OE. capitain, captain, OF. capitain, F. capitaine (cf. Sp. capitan, It. capitano), LL. capitaneus, capitanus, fr. L. caput the head. See under Chief, and cf. Chieftain.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "captain" is labeled noun. Its etymology is recorded as: "[OE. capitain, captain, OF. capitain, F. capitaine (cf. Sp. capitan, It. capitano), LL. capitaneus, capitanus, fr. L. caput the head. See under Chief, and cf. Chieftain.]" The selected historical definition says: "A head, or chief officer"