Exact historical dictionary sense
Even in Webster's 1913 dictionary
The 1913 record labels even as adverb. Its source-bounded etymology and selected historical definition appear below.
[AS. efne. See Even, a., and cf. E'en.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "even" is labeled adverb. Its etymology is recorded as: "[AS. efne. See Even, a., and cf. E'en.]" The selected historical definition says: "In an equal or precisely similar manner; equally; precisely; just; likewise; as well."