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| Date: | 1300-1400 |
| Language: | Old French |
| Origin: | 'three-sided piece, corner', from Latin cuneus; CUNEIFORM |
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coin1 S3 W3
1 [countable] a piece of metal, usually flat and round, that is used as money [↪ bill, note]
2 to choose or decide something by throwing a coin into the air and guessing which side of it will show when it falls : 
Toss a coin to see who goes first.
toss/flip a coin
Toss a coin to see who goes first.3 a different or opposite way of thinking about something : Making the rules is only part of it. How the rules are carried out is the other side of the coin.
the other/opposite side of the coin
Making the rules is only part of it. How the rules are carried out is the other side of the coin.4 two problems or situations that are so closely connected that they are really just two parts of the same thing : Great opportunity and great danger are two sides of the same coin.
two sides of the same coin
Great opportunity and great danger are two sides of the same coin.5 [uncountable] money in the form of metal coins
