A lye is a liquid obtained by leaching ashes (containing largely potassium carbonate or "potash"), or a strong alkali which is highly soluble in water producing caustic basic solutions. "Lye" is commonly the alternative name of sodium hydroxide (NaOH) or historically potassium hydroxide (KOH).

The Lye and Wollescote Cemetery is an actively used  cemetery in Lye, West Midlands, England.