- a former money of account of the United Kingdom, equal to 21 shillings: still often used in quoting fees or prices.
- a gold coin of Great Britain issued from 1663 to 1813, with a nominal value of 20 shillings.
- a contemptuous term used to refer to a person of Italian birth or descent.
- a person who does miscellaneous work in or around a horse stable.
- a coastal region in western Africa, extending from the Gambia River to the Gabon estuary.
- an independent republic in western Africa, on the Atlantic coast. About 96,900 sq. mi. (251,000 sq. km). Capital: Conakry.
- a part of the Atlantic Ocean that projects into the western coast of Africa and extends from the Ivory Coast to Gabon.
- a British gold coin taken out of circulation in 1813, worth 21 shillings
- the sum of 21 shillings (£1.05), still used in some contexts, as in quoting professional fees
- See guinea fowl
- an Italian or a person of Italian descent
- a republic in West Africa, on the Atlantic: established as the colony of French Guinea in 1890 and became an independent republic in 1958. Official language: French. Religion: Muslim majority and animist. Currency: franc. Capital: Conakry. Pop: 11 176 026 (2013 est). Area: 245 855 sq km (94 925 sq miles)
- (formerly) the coastal region of West Africa, between Cape Verde and Namibe (formerly Moçâmedes; Angola): divided by a line of volcanic peaks into Upper Guinea (between The Gambia and Cameroon) and Lower Guinea (between Cameroon and S Angola)
- a large inlet of the S Atlantic on the W coast of Africa, extending from Cape Palmas, Liberia, to Cape Lopez, Gabon: contains two large bays, the Bight of Bonny and the Bight of Benin, separated by the Niger delta
