Source : Webster's Revised Unabridged Dictionary (1913)

Salmon \Salm"on\ (s[a^]m"[u^]n), n.; pl. {Salmons} (-[u^]nz) or
   (collectively) {Salmon}. [OE. saumoun, salmon, F. saumon, fr.
   L. salmo, salmonis, perhaps from salire to leap. Cf. {Sally},
   v.]
   1. (Zo["o]l.) Any one of several species of fishes of the
      genus {Salmo} and allied genera. The common salmon ({Salmo
      salar}) of Northern Europe and Eastern North America, and
      the California salmon, or quinnat, are the most important
      species. They are extensively preserved for food. See
      {Quinnat}.

Salmon \Salm"on\ (s[a^]m"[u^]n), n.; pl. {Salmons} (-[u^]nz) or
   (collectively) {Salmon}. [OE. saumoun, salmon, F. saumon, fr.
   L. salmo, salmonis, perhaps from salire to leap. Cf. {Sally},
   v.]
   1. (Zo["o]l.) Any one of several species of fishes of the
      genus {Salmo} and allied genera. The common salmon ({Salmo
      salar}) of Northern Europe and Eastern North America, and
      the California salmon, or quinnat, are the most important
      species. They are extensively preserved for food. See
      {Quinnat}.

Salmon \Salm"on\, a.
   Of a reddish yellow or orange color, like that of the flesh
   of the salmon.

Source : WordNet®

salmon
     n 1: any of various large food and game fishes of northern
          waters; usually migrate from salt to fresh water to
          spawn
     2: a tributary of the Snake River in Idaho [syn: {Salmon River}]
     3: flesh of any of various marine or freshwater fish of the
        family Salmonidae