(philosophy) The principle, especially in 20th-century empiricism, that a statement has meaning if, and only if, either it can be verified by means of empirical observations or it is logically true by definition.

Have general faith in the good intentions of others, but ultimately you can only rely on things you have verified yourself.

To confirm one's identity, one's sex, or that one is not a bot by providing a voice sample by telephone etc., for example when dating online.

(archaic) Third-person singular simple present indicative form of verify

(archaic) second-person singular simple present form of verify