\Lye\, n. [Written also {lie} and {ley}.] [AS. le['a]h; akin
to D. loog, OHG. louga, G. lauge; cf. Icel. laug a bath, a
hot spring.]
A strong caustic alkaline solution of potassium salts,
obtained by leaching wood ashes. It is much used in making
soap, etc.

\Lye\, n. (Railroad)
A short side line, connected with the main line; a turn-out;
a siding. [Eng.]

\Lye\, n.
A falsehood. [Obs.] See {Lie}.