Noah Webster's New International Dictionary of the English Language

1. (v. t.) To take the load from; to discharge of a load or cargo; to disburden; as, to unload a ship; to unload a beast.

2. (v. t.) Hence, to relieve from anything onerous.

3. (v. t.) To discharge or remove, as a load or a burden; as, to unload the cargo of a vessel.

4. (v. t.) To draw the charge from; as, to unload a gun.

5. (v. t.) To sell in large quantities, as stock; to get rid of.

6. (v. i.) To perform the act of unloading anything; as, let unload now.