- An abusive, bitter denunciation.
- A prolonged discourse.
- A speech or writing which bitterly denounces something.
Etymology: First attested 1581, from Latin diatriba (learned discussion or discourse) < Greek (waste of time, pastime) < - (away) + (to wear or rub).
- The senator was prone to diatribes which could go on for more than an hour.
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Full Definition of diatribe