The Collaborative International Dictionary of English v.0.48:

Aleut \Aleut\ n.
   a member of the people inhabiting the Aleutian Islands. Same
   as Aleutian, n.

   Syn: Aleutian.
        [WordNet 1.5] Aleutian

WordNet (r) 3.0 (2006):

Aleut
    n 1: a member of the people inhabiting the Aleutian Islands and
         southwestern Alaska [syn: Aleut, Aleutian]
    2: a community of Native Americans who speak an Eskimo-Aleut
       language and inhabit the Aleutian Islands and southwestern
       Alaska; "the Aleut and the Eskimo are related culturally and
       linguistically"
    3: the language spoken by the Aleut