Webster's Revised Unabridged Dictionary · 1913

Shoehorn

Shoehorn , noun

1.
A curved piece of polished horn, wood, or metal used to facilitate the entrance of the foot into a shoe.
2.
(a) Anything by which a transaction is facilitated; a medium; -- by way of contempt.
(b)
Anything which draws on or allures; an inducement. [Low] — Spectator

Also: Shoeing-horn

Shoehorn , transitive verb

to squeeze or force into a tight-fitting space, with or as though with a shoehorn; -- often used figuratively.