1. A unit of mass in the imperial and US customary system of units, equal to 0.45359237 kilograms.
2. A unit of currency, symbolized by the £ sign and GBP, its value originally linked to that of 1 pound in weight of silver. Once used more widely, it is now used in the UK where it is known as the pound sterling, reflecting its historical context, and in certain UK Crown Dependencies and British Overseas Territories, which issue their own currencies trading at parity with the UK pound. A number of other countries also use currencies called pound.