validator
n. countablen. a person or a computer program that checks if something is correct or follows the rules. In cryptocurrency, a validator is a participant in a Proof of Stake network who verifies transactions and adds new blocks, earning staking rewards for helping secure the blockchain.
n. a person or mechanism that verifies the accuracy, validity, or compliance of data, processes, or systems against a set of established criteria. In cryptocurrency, a validator stakes coins as collateral and is chosen to verify transactions and propose blocks in a Proof of Stake system.
The software includes a validator to check for errors in the code.
Before submitting your application, use the online validator to ensure all required fields are filled out correctly.
The security protocol employs a strict schema validator to reject any incoming packets that deviate from the predefined communication standards.
From Latin validāre ("to make valid"), via validate: one who checks that something is valid.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Last updated July 19, 2026