Providing evidence or confirmation that supports what someone else has said; agreeing with or backing up a statement with proof.
From Latin 'corroborare' meaning 'to strengthen,' from 'cor-' (together) plus 'roborare' (to strengthen, from 'robur' meaning oak or strength); originally a legal term for strengthening a case with evidence.
In court, one witness's testimony isn't enough—that's why lawyers need 'corroborating witnesses' who can back up the story, which is why this word is so powerful in legal dramas and why a single alibi isn't considered proof.
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