Hang On Meaning

Example :   Hang on. Let me check.‎To hold, grasp, or grip.  Hang on to the handle so you don't drop it.‎1913, Joseph C. Lincoln, chapter 7, Mr. Pratt's Patients:  Old Applegate, in the stern, just set and looked at me, and Lord James, amidship, waved both arms and kept hollering for help. I took a couple of everlasting big strokes and managed to grab hold of the skiff's rail, close to the stern. Then, for a jiffy, I hung on and fought for breath.  Hang on to my jacket until I get back.‎  The audience hangs on his every word.‎  He's got a philosophy he hangs on to.‎  Just hang on and keep going; this pain won't last forever.‎1972 : Perfect Day by Lou Reed  It's such a perfect day, I'm glad I spend it with you  Such a perfect day you just keep me hanging on  You just keep me hanging on