Noah Webster's New International Dictionary of the English Language

1. (v. t.) To call; to summon.

2. (v. t.) To call upon to witness.

3. (v. t.) To warrant; to maintain by affirmations; to attest; to affirm; to avouch.

4. (v. t.) To back; to support; to confirm; to establish.

5. (v. t.) To call into court to warrant and defend, or to make good a warranty of title.

6. (v. i.) To bear witness; to give testimony or full attestation.

7. (v. i.) To assert; to aver; to declare.

8. (n.) Warrant; attestation.