What is Node?
A computer running Bitcoin software that independently validates every block and transaction against the consensus rules.
Nodes are where the rules actually live. A node rejects an invalid block regardless of how much work is behind it, which is why miners cannot unilaterally change the rules — they can only produce blocks that nodes will accept.
Running your own node means you verify rather than trust. It is the difference between knowing the rules were followed and being told they were.
Nodes do not mine and are not paid. They are the enforcement layer, not the production layer.
Related terms
Full node
A node that downloads and validates the entire chain from genesis rather than trusting anyone else's summary…
NetworkConsensus rules
The validity conditions every node enforces: issuance schedule, signature validity, block weight, and…
MiningMining
The process of assembling candidate blocks and searching for a valid proof of work, rewarded with the block…
This definition is part of the Bitcoin Logical glossary. For the fuller explanation, start with Learn, or see the live numbers on The Bitcoin Signal.