/is'may euh lee"euh, -muy euh-/ , n. Islam.
1. a branch of Shi'ism, including in its number the Assassins and the Druses, having an esoteric philosophy and asserting Isma'il to be the seventh divinely inspired imam in the succession from Ali.
2. Ismailia.
[ Isma'iliyah, see ISMA'ILIAN ]