lye

Short definition from Wiktionary

Noun

1. 1
   An alkaline liquid made by leaching ashes (usually wood ashes).
2. 2
   Potassium or sodium hydroxide (caustic soda).
3. 3
   Obsolete spelling of lie.
4. 4
   A short side line, connected with the main line; a turn-out; a siding.

Verb

1. 1
   To treat with lye.
2. 2
   Obsolete spelling of lie.

Proper noun

1. 1
   A suburban area in the Metropolitan Borough of Dudley, West Midlands, England (OS grid ref SO9284).
2. 2
   A diminutive of the female given name Lyanna.