Noah Webster's New International Dictionary of the English Language

1. (v. t.) To still; to silence; to calm; to make quiet; to repress the noise or clamor of.

2. (v. t.) To appease; to allay; to calm; to soothe.

3. (v. i.) To become or to keep still or quiet; to become silent; -- esp. used in the imperative, as an exclamation; be still; be silent or quiet; make no noise.

4. (n.) Stillness; silence; quiet.

5. (a.) Silent; quiet.