Added 9 October 2026 tiber noun Categories: NatureRare Words noun ! Definition from WordNet 3.1, Princeton University. More about tiber at Wordnik → Where our words come from → A river of central Italy; flows through Rome to the Tyrrhenian Sea. Related Words: teveretarotrastevereostiativoliarnoromerenotiszatennatrentcivitavecchia Back to today's word