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Definition: block reward

The amount of Bitcoins generated for a miner's account after adding a block of transactions to the blockchain. The block reward is cut in half every 210,000 blocks, which takes approximately four years. Designed to end in 2140, as time passes, it becomes increasingly difficult to reap monetary benefit from the reward. Eventually, a miner's income will be derived only from transaction fees. See Bitcoin mining, blockchain and Bitcoin.