Source : Webster's Revised Unabridged Dictionary (1913)

Seethe \Seethe\, v. t. [imp. {Seethed}({Sod}, obs.); p. p.
   {Seethed}, {Sodden}; p. pr. & vb. n. {Seething}.] [OE.
   sethen, AS. se['o]?an; akin to D. sieden, OHG. siodan, G.
   sieden, Icel. sj??a, Sw. sjuda, Dan. syde, Goth. saubs a
   burnt offering. Cf. {Sod}, n., {Sodden}, {Suds}.]
   To decoct or prepare for food in hot liquid; to boil; as, to
   seethe flesh. [Written also {seeth}.]

         Set on the great pot, and seethe pottage for the sons
         of the prophets.                         --2 Kings iv.
                                                  38.

Sod \Sod\, n. (Zo["o]l.)
   The rock dove. [Prov. Eng.]

Sod \Sod\, obs.
   imp. of {Seethe}.

Sod \Sod\, n. [Akin to LG. sode, D. zode, OD. sode, soode,
   OFries. satha, and E. seethe. So named from its sodden state
   in wet weather. See {Seethe}.]
   That stratum of the surface of the soil which is filled with
   the roots of grass, or any portion of that surface; turf;
   sward.

         She there shall dress a sweeter sod Than Fancy's feet
         have ever trod.                          --Collins.

Sod \Sod\, v. t. [imp. & p. p. {Sodden}; p. pr. & vb. n.
   {Sodding}.]
   To cover with sod; to turf.

Source : WordNet®

sod
     n 1: surface layer of ground containing a matt of grass and grass
          roots [syn: {turf}, {sward}, {greensward}]
     2: an enzyme that catalyzes the conversion of superoxide into
        hydrogen peroxide and oxygen; "oxygen free radicals are
        normally removed in our bodies by the superoxide dismutase
        enzymes" [syn: {superoxide dismutase}]
     3: someone who engages in anal copulation (especially a male
        who engages in anal copulation with another male) [syn: {sodomite},
         {sodomist}, {bugger}]
     4: an informal British term for a youth or man; "the poor sod
        couldn't even buy a drink"
     [also: {sodding}, {sodded}]

sod
     v : cover with sod
     [also: {sodding}, {sodded}]