Coin/kɔɪn/ Definition 1 of 4Pro Tip 1/3Physical Money Coins are tangible and often have distinct designs that vary by country. Check out the design on this Japanese coin. Pro Tip 2/3Historic Value Older coins may be collectible and valued beyond their monetary worth. This ancient Roman coin is worth a lot to collectors. Pro Tip 3/3Everyday Language In conversational English, 'coins' often refers to small amounts of money in general. Could you lend me some coins for the vending machine?