NOUN (3)

1. a member of the Muskhogean people formerly living in Georgia and eastern Alabama and constituting the core of the Creek Confederacy;

2. a town in eastern Oklahoma on the Arkansas River;

3. the Muskhogean language spoken by the Muskogee;

The Collaborative International Dictionary of English v.0.48:

Muskogees \Mus*ko"gees\, n. pl.; sing. Muskogee. (Ethnol.)
   A powerful tribe of North American Indians that formerly
   occupied the region of Georgia, Florida, and Alabama. They
   constituted a large part of the Creek confederacy. [Written
   also Muscogees.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

Muskogee
    n 1: a member of the Muskhogean people formerly living in
         Georgia and eastern Alabama and constituting the core of
         the Creek Confederacy
    2: a town in eastern Oklahoma on the Arkansas River
    3: the Muskhogean language spoken by the Muskogee