Source : Webster's Revised Unabridged Dictionary (1913)

Primates \Pri*ma"tes\, n. pl. [NL.] (Zo["o]l.)
   The highest order of mammals. It includes man, together with
   the apes and monkeys. Cf. {Pitheci}.

Source : WordNet®

Primates
     n : an animal order including lemurs and tarsiers and monkeys
         and apes and human beings [syn: {order Primates}]