What does adulterate mean?
The definition of adulterate
A*dul”ter*ate, v. t.
[imp. & p. p. Adulterated; p. pr. & vb. nAdulterating.]
Etym: [L. adulteratus, p. p. of adulterare, fr. adulter adulterer, prob. fr. ad + alter other, properly one who approaches another on account of unlawful love. Cf. Advoutry.]

1 To defile by adultery. [Obs.] Milton.
2 To corrupt, debase, or make impure by an admixture of a foreign or a baser substance; as, to adulterate food, drink, drugs, coin, etc. The present war has . . . adulterated our tongue with strange words. Spectator.

Synonyms
— To corrupt; defile; debase; contaminate; vitiate; sophisticate.

A*dul”ter*ate, v. i.
To commit adultery. [Obs.]
A*dul”ter*ate, a.
1 Tainted with adultery.
2 Debased by the admixture of a foreign substance; adulterated; spurious.

— A*dul”ter*ate*ly, adv.
— A*dul”ter*ate*ness, n.