The definition of smother is to suffocate someone by covering their nose and mouth to cut off air, to cover something entirely, or to making someone feel trapped and overwhelmed by attention and affection.(verb)
See smother in Webster's New World College Dictionary
Origin: ME smorthren < smorther, dense smoke < base of OE smorian, to suffocate, akin to MLowG smoren, to smoke < var. of IE base *smel- > smell
See smother in American Heritage Dictionary 4
verb smoth·ered, smoth·er·ing, smoth·ers verb, transitive
Origin: Middle English smotheren
Origin: , from smorther, dense smoke; see smolder.
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