Exact historical dictionary sense
Brief in Webster's 1913 dictionary
The 1913 record labels brief as noun. Its source-bounded etymology and selected historical definition appear below.
[See Brief, a., and cf. Breve.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "brief" is labeled noun. Its etymology is recorded as: "[See Brief, a., and cf. Breve.]" The selected historical definition says: "A short concise writing or letter; a statement in few words."