Definition from Wiktionary, the free dictionary
- (Islam) A leader in Islamic eschatology, who, it is believed, will appear and restore peace and justice before the end of the world. [from 17th c.]
- Ahmadis consider Mirza Ghulam Ahmed to be the Mahdi.
- 2012, Piers Brendon, ‘Beginning the Dissent’, Literary Review, vol. 401:
- Al-Afghani was a polyglot Persian who became an international agitator, aspiring [...] to unify the Muslim masses behind the Caliph (or even the Mahdi) and to become himself the Luther of an Islamic reformation.