The Collaborative International Dictionary of English v.0.48:

Pahlavi \Pah"la*vi\, Pahlevi \Pah"le*vi\, n.
   1. The language of Sassanian Persia. See Pehlevi.
      [1913 Webster]

   2. The script in which the Pahlavi language was written. It
      was taken from the Aramaic alphabet.
      [PJC]

   3. A gold coin formerly used in Iran, equal in value to 20
      rials.
      [PJC]

WordNet (r) 3.0 (2006):

Pahlevi
    n 1: Shah of Iran who was deposed in 1979 by Islamic
         fundamentalists (1919-1980) [syn: Pahlavi, Mohammed Reza
         Pahlavi, Shah Pahlavi, Pahlevi, Mohammed Reza
         Pahlevi]