Exact historical dictionary sense
Rate in Webster's 1913 dictionary
The 1913 record labels rate as noun. Its source-bounded etymology and selected historical definition appear below.
[OF., fr. L. rata (sc. pars), fr. ratus reckoned, fixed by calculation, p. p. of reri to reckon, to calculate. Cf. Reason.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "rate" is labeled noun. Its etymology is recorded as: "[OF., fr. L. rata (sc. pars), fr. ratus reckoned, fixed by calculation, p. p. of reri to reckon, to calculate. Cf. Reason.]" The selected historical definition says: "Established portion or measure; fixed allowance."