The Collaborative International Dictionary of English v.0.48:

Smother \Smoth"er\, v. i.
   1. To be suffocated or stifled.
      [1913 Webster]

   2. To burn slowly, without sufficient air; to smolder.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Smother \Smoth"er\, n. [OE. smorther. See Smother, v. t.]
   1. Stifling smoke; thick dust. --Shak.
      [1913 Webster]

   2. A state of suppression. [Obs.]
      [1913 Webster]

            Not to keep their suspicions in smother. --Bacon.
      [1913 Webster]

   3. That which smothers or causes a sensation of smothering,
      as smoke, fog, the foam of the sea, a confused multitude
      of things.

            Then they vanished, swallowed up in the grayness of
            the evening and the smoke and smother of the storm.
                                                  --The Century.
      [Webster 1913 Suppl.]

   Smother fly (Zool.), an aphid.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Smother \Smoth"er\, v. t. [imp. & p. p. Smothered; p. pr. &
   vb. n. Smothering.] [OE. smotheren; akin to E. smoor. See
   Smoor.]
   1. To destroy the life of by suffocation; to deprive of the
      air necessary for life; to cover up closely so as to
      prevent breathing; to suffocate; as, to smother a child.
      [1913 Webster]

   2. To affect as by suffocation; to stife; to deprive of air
      by a thick covering, as of ashes, of smoke, or the like;
      as, to smother a fire.
      [1913 Webster]

   3. Hence, to repress the action of; to cover from public
      view; to suppress; to conceal; as, to smother one's
      displeasure.
      [1913 Webster]

WordNet (r) 3.0 (2006):

smother
    n 1: a confused multitude of things [syn: clutter, jumble,
         muddle, fuddle, mare's nest, welter, smother]
    2: a stifling cloud of smoke
    v 1: envelop completely; "smother the meat in gravy" [syn:
         smother, surround]
    2: deprive of oxygen and prevent from breathing; "Othello
       smothered Desdemona with a pillow"; "The child suffocated
       herself with a plastic bag that the parents had left on the
       floor" [syn: smother, asphyxiate, suffocate]
    3: conceal or hide; "smother a yawn"; "muffle one's anger";
       "strangle a yawn" [syn: smother, stifle, strangle,
       muffle, repress]
    4: form an impenetrable cover over; "the butter cream smothered
       the cake"
    5: deprive of the oxygen necessary for combustion; "smother
       fires" [syn: smother, put out]