a.

1. 决定性的；最后的
2. 限定的
3. 最可靠的

n.

1. 【语】限定词

adj.

1. (of a conclusion or agreement) done or reached decisively and with authority.
   ▸(of a book or other text) the most authoritative of its kind.
2. (of a postage stamp) for general use, not special or commemorative.

n.