Pronunciation IPA: /'pɛni/ (US) SAMPA: /pE.ni/ Noun penny (Plural: pennies when referring to individual coins; (UK) pence when referring to an amount of money (formerly) In the United Kingdom, a copper coin worth 1/240 of a pound before decimalisation. In the United Kingdom, a copper coin worth 1/100 of a pound. In the US and Canada, a one-cent coin, worth 1/100 of a dollar. Verb to penny To jam a door shut by inserting pennies between the door frame and the door. Ex. Herbert had only been at college for a week when his door was pennied by the guys down the hall. penny in a fuse box 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.