Definitions of smother:

• noun:   a stifling cloud of smoke
• noun:   a confused multitude of things
• verb:   form an impenetrable cover over

  Example: "The butter cream smothered the cake"

• verb:   conceal or hide

  Example: "Smother a yawn"

• verb:   envelop completely

  Example: "Smother the meat in gravy"

• verb:   deprive of the oxygen necessary for combustion

  Example: "Smother fires"

• verb:   deprive of oxygen and prevent from breathing

  Example: "Othello smothered Desdemona with a pillow"