Meanings
To wait a moment.
Example: "Hang on. Let me check."
To hold, grasp, or grip.
Example: "Hang on to the handle so you don't drop it."
To keep; to store something for someone.
Example: "Hang on to my jacket until I get back."
To pay close attention to, or regard with (possibly obsequious) admiration.
Example: "The audience hangs on his every word."
To continually believe in something; to have faith in.
Example: "He's got a philosophy he hangs on to."