Added 8 October 2026 thunderstorm /ˈθʌn.dɚˌstɔɹm/ noun Categories: NatureRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about thunderstorm at Wordnik → Where our words come from → A storm resulting from strong rising air currents; heavy rain or hail along with thunder and lightning. Origin From thunder + storm. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: hurricanestormlightningtempestthundershowerrainstormrainthundersmokyriot Back to today's word