Exact historical dictionary sense
Reason in Webster's 1913 dictionary
The 1913 record labels reason as verb. Its source-bounded etymology and selected historical definition appear below.
[Cf. F. raisonner. See Reason, n.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "reason" is labeled verb. Its etymology is recorded as: "[Cf. F. raisonner. See Reason, n.]" The selected historical definition says: "To exercise the rational faculty; to deduce inferences from premises; to perform the process of deduction or of induction; to ratiocinate; to reach conclusions by a systematic comparison of facts."