tsunamia long high sea wave caused by an earthquake or other disturbanceThe 2004 tsunami in the Indian Ocean caused widespread devastation across coastal communities.NoteThe 2004 tsunami in the Indian Ocean caused widespread devastation across coastal communities.Elon.io is an online learning platformWe have an entire course teaching IELTS Vocabulary — Band 7+ grammar and vocabulary.Start learning IELTS Vocabulary — Band 7+ now