Definitions from Wiktionary ( )

▸ noun:  (historical) In the United Kingdom and Ireland, a unit of currency worth ¹⁄₂₄₀ of a pound sterling or Irish pound before decimalisation, or a copper coin worth this amount. Abbreviation: d.
▸ noun:  In the United Kingdom, a unit of currency worth ¹⁄₁₀₀ of a pound sterling, or a copper coin worth this amount. Abbreviation: p.
▸ noun:  (historical) In Ireland, a coin worth ¹⁄₁₀₀ of an Irish pound before the introduction of the euro. Abbreviation: p.
▸ noun:  In the US and (formerly) Canada, a one-cent coin, worth ¹⁄₁₀₀ of a dollar. Abbreviation: ¢.
▸ noun:  In various countries, a small-denomination copper or brass coin.
▸ noun:  A unit of nail size, said to be either the cost per 100 nails, or the number of nails per penny. Abbreviation: d.
▸ noun:  Money in general.
▸ verb:  (slang) To jam a door shut by inserting pennies between the doorframe and the door.
▸ verb:  (electronics) To circumvent the tripping of an electrical circuit breaker by the dangerous practice of inserting a coin in place of a fuse in a fuse socket.
▸ verb:  (Oxbridge slang) During a meal or as part of a drinking game, to drop a penny in a person's drink with the expectation that they finish it (or some such variation thereof); commonly associated with crewdates at Oxford and swaps at Cambridge.
▸ noun:  A diminutive of the female given name Penelope.
▸ noun:  A surname.
▸ noun:  A place name, presumably all taken from the surname:
▸ noun:  An unincorporated community in Calloway County, Kentucky, United States.
▸ noun:  An unincorporated community in Pike County, Kentucky.
▸ noun:  A small community on the Fraser River in central British Columbia, Canada.

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