Foi"son (?), n. [F. foison, fr. L. fusio a pouring, effusion. See
Fusion.] Rich harvest; plenty; abundance. [Archaic] Lowell.
That from the seedness the bare fallow brings To teeming foison.
Shak.
Foist (foist), n. [OF. fuste stick, boat, fr. L. fustis cudgel. Cf. 1st
Fust.] A light and fast-sailing ship. [Obs.] Beau. & Fl.
Foist, v. t. [imp. & p. p. Foisted; p. pr. & vb. n. Foisting.] [Cf. OD.
vysten to fizzle, D. veesten, E. fizz, fitchet, bullfist.] To insert
surreptitiously, wrongfully, or without warrant; to interpolate; to
pass off (something spurious or counterfeit) as genuine, true, or
worthy; -- usually followed by in.
Lest negligence or partiality might admit or foist in abuses and
corruption.
R. Carew.
When a scripture has been corrupted . . . by a supposititious
foisting of some words in.
South.
Foist, n. 1. A foister; a sharper. [Obs.] B. Jonson.