constituteto form or compose a specified proportion of somethingRenewable sources constituted just 15% of the total energy supply in 2015.NoteRenewable sources constituted just 15% of the total energy supply in 2015.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