A policy allowing an unconfirmed transaction to be replaced by one paying a higher fee.
Replace-by-fee is best understood as part of a system rather than as an isolated definition. Its related coordinates show the mechanisms, incentives and historical records that give the term practical meaning.
Replace-by-fee describes how participants value, trade or obtain exposure to bitcoin. Market behavior can affect adoption and mining economics, but it does not rewrite consensus rules. Price evidence and protocol evidence answer different questions.
Understanding Replace-by-fee helps distinguish a verifiable Bitcoin mechanism or historical record from slogans, products and market narratives.
For the clearest picture, read this entry together with Fee rate, Mempool, Transaction, Child pays for parent. The reverse links also lead from Fee rate, Child pays for parent, Peter Todd.
Linked to related atlas coordinates
Grounded in a source record
Explains function and trade-offs
Part of the open Bitcoin knowledge graph