Pronunciation: (rān'mā"kur),[key] —n. 1. (among American Indians) a medicine man who by various rituals and incantations seeks to cause rain.
2. a person who induces rainfall by using various scientific techniques, as the seeding of clouds with silver iodide crystals from an airplane.
3. Slang.an executive or lawyer with exceptional ability to attract clients, use political connections, increase profits, etc.: The president has several rainmakers among his advisers.