coin
noun /kɔɪn/
/kɔɪn/
Idioms 
enlarge image[countable] a small flat piece of metal used as money- gold coins
- a pound/euro/dollar coin
- They flipped a coin to see who should go first.
- You might as well toss a coin to decide.
- A coin toss has decided the lucky winner.
Extra ExamplesTopics Shoppingb1- The first English gold coin was struck in 1255.
- The last silver coins were minted in 1964.
- Very few old 5p coins are still in circulation.
- What is the probability of the coin landing heads?
- coins jingling in his pockets
Oxford Collocations Dictionaryadjective- bronze
- copper
- gold
- …
- issue
- mint
- strike
- …
- be in circulation
- circulate
- clink
- …
- purse
- collector
- flip
- …
- the flip of a coin
- the toss of a coin
- [uncountable] money made of metal
- notes and coin
Word OriginMiddle English: from Old French coin ‘wedge, corner, die’, coigner ‘to mint’, from Latin cuneus ‘wedge’. The original sense was ‘cornerstone’, later ‘angle or wedge’ (senses now spelled quoin); in late Middle English the term denoted a die for stamping money, or a piece of money produced by such a die.
Idioms
the other side of the coin
- the aspect of a situation that is the opposite of or contrasts with the one you have been talking about
two sides of the same coin
- used to talk about two ways of looking at the same situation