Exact historical dictionary sense
Expansion in Webster's 1913 dictionary
The 1913 record labels expansion as noun. Its source-bounded etymology and selected historical definition appear below.
[L. expansio: cf. F. expansion.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "expansion" is labeled noun. Its etymology is recorded as: "[L. expansio: cf. F. expansion.]" The selected historical definition says: "The act of expanding or spreading out; the condition of being expanded; dilation; enlargement."