Source : Webster's Revised Unabridged Dictionary (1913)

Iowas \I"o*was\, n. pl.; sing. {Iowa}. (Ethnol.)
   A tribe of Indians which formerly occupied the region now
   included in the State of Iowa.

Source : WordNet®

Iowa
     n 1: a member of the Siouan people formerly living in Iowa and
          Minnesota and Missouri [syn: {Ioway}]
     2: a state in midwestern United States [syn: {Hawkeye State}, {IA}]
     3: a dialect of the Chiwere language spoken by the Iowa people
        [syn: {Ioway}]