Subject:  

The grammatical element in a clause (typically a substantive) denoting the specific person, place, or thing about which the predicate is asserted. The subject performs the action of an active verb, receives the action of a passive verb, or exists in the state expressed by an equative verb. Individual modifiers, phrases, or clauses may expand the subject. Some grammarians include all the modifiers as the subject, but functionally the subject is the word itself without any of its modifiers.