A thing or things helpful in forming a conclusion or judgment: The broken window was evidence that a burglary had taken place. Scientists weigh the evidence for and against a hypothesis. Something indicative; an outward sign: evidence of grief on a mourner's face. Law The documentary or oral statements and the material objects admissible as testimony in a court of law. To indicate clearly; exemplify or prove. To support by testimony; attest. in evidence Plainly visible; to be seen: It was early, and few pedestrians were in evidence on the city streets. in evidence Law As legal evidence: submitted the photograph in evidence.