nominative

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Appointed to office.
• adjective Nominated as a candidate for office.
• adjective Having or bearing a person's name.
• adjective Grammar Of, relating to, or being the case of the subject of a finite verb (as I in I wrote the letter) and of words identified with the subject of a copula, such as a predicate nominative (as children in These are his children).
• noun The nominative case.
• noun A word or form in the nominative case.

from The Century Dictionary.

• Noting the subject: applied to that form of a noun or other word having case-inflection which is used when the word is the subject of a sentence, or to the word itself when it stands in that relation: as, the nominative case of a Latin word; the nominative word in a sentence.
• noun In grammar, the nominative case; also, a nominative word. Abbreviated nominative

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Gram.) Giving a name; naming; designating; -- said of that case or form of a noun which stands as the subject of a finite verb.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective grammar Giving a name; naming; designating; — said of that case or form of a noun which stands as the subject of a finite verb.
• noun The nominative case.
• noun A noun in the nominative case.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective serving as or indicating the subject of a verb and words identified with the subject of a copular verb
• adjective appointed by nomination
• noun the category of nouns serving as the grammatical subject of a verb
• adjective named; bearing the name of a specific person