Multi-signing
Plain definition. Multi-signing is a way to approve transactions on the XRP Ledger using a combination of several secret keys instead of just one.
Technical definition. Multi-signing in the XRP Ledger is a method of authorizing transactions by using a combination of multiple secret keys, and it requires a signer list of 1 to 32 addresses set with the SignerListSet transaction. Each signer gets a weight, and the quorum is the minimum weight total required to authorize a transaction. A multi-signed transaction must include the SigningPubKey field as an empty string and a Signers field holding an array of signatures whose combined weight is equal to or greater than the quorum.
On this site
On this site, Multi-signing comes up in Is XRP’s cryptography at risk from quantum computers?, What XRP Ledger features can protect my account (regular keys, multi-signing, disabling the master key)?, What happens to my XRP when I die?, Are people really being attacked physically for crypto? and Can I lose my XRP without anyone hacking me?.
Source
Multi-Signing (xrpl.org), read October 1, 2026.