Lime has several meanings:

• Limestone
• Agricultural lime - a mineral soil additive
• Calcium oxide (also quicklime) - a chemical compound
• Calcium hydroxide (also slaked lime) - a chemical compound

• Lime (fruit) - a Citrus tree with a green fruit similar to a lemon, and the fruit of that tree.
• Australian lime - six small Citrus species native to Australia
• Kaffir lime - a Southeast Asian Citrus with very pungent leaves.
• Key lime - a lime oiginally from Asia but now commonly grown and consumed across North America.
• Persian Lime - a lime sort with thick skin.

• Tilia - a genus of trees, known as "lime tree" in Britain and "linden tree" in North America.

• Lime (colour) - a yellowish green color, essentially the same as chartreuse.

• Lime (band) - a 1980s disco band.

• Lime (anime) - a term from anime and manga, a derivative of lemon (anime).

• Lyme disease - an infectious disease, caused by the Borrelia spirochete, a gram-negative microorganism.