Noah Webster's New International Dictionary of the English Language

1. (v. i.) To slaver; to let spittle drop or flow from the mouth, like a child, idiot, or dotard.

2. (v. i.) To be weak or foolish; to dote; as, a driveling hero; driveling love.

3. (n.) Slaver; saliva flowing from the mouth.

4. (n.) Inarticulate or unmeaning utterance; foolish talk; babble.

5. (n.) A driveller; a fool; an idiot.

6. (n.) A servant; a drudge.