add. ·noun a person strikingly handsome, beautiful, or fine; one who wins admiration; a "stunner.".
2. knocker ·noun one who, or that which, knocks; specifically, an instrument, or kind of hammer, fastened to a door, to be used in seeking for admittance.
3. knocker ·add. ·noun a species of large cockroach, ·esp. blabera gigantea, of semitropical america, which as able to produce a loud knocking sound.