Added 10 October 2026 borer /ˈbɔːɹə/ noun Categories: ThingsAnimalsRare Words In Latin: terebra Wiktionary noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about borer at Wordnik → Where our words come from → A drill for penetrating rock. Any of various insects or larvae or mollusks that bore into wood. Related Words: woodborergemcornstalktwigpeachtreebananapeachshipwormweevil Back to today's word