Exact historical dictionary sense
File in Webster's 1913 dictionary
The 1913 record labels file as noun. Its source-bounded etymology and selected historical definition appear below.
[F. file row (cf. Pr., Sp., Pg., & It. fila), LL. fila, fr. L. filum a thread. Cf. Enfilade, Filament, Fillet.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "file" is labeled noun. Its etymology is recorded as: "[F. file row (cf. Pr., Sp., Pg., & It. fila), LL. fila, fr. L. filum a thread. Cf. Enfilade, Filament, Fillet.]" The selected historical definition says: "An orderly succession; a line; a row"