hang on phrasal verb ( see also ↑ hang )
1 . to hold something tightly
hang on to
She hung on to the side of the cart.
Hang on tight!
2 . hang on! British English spoken
a) used to ask or tell someone to wait SYN hold on :
Hang on! I’ll be back in a minute.
b) used when you have just noticed or thought of something that is interesting or wrong
3 . hang on something to depend on something:
Everything hangs on the outcome of this meeting.
4 . hang on sb’s words/every word to pay close attention to everything someone is saying:
She was watching his face, hanging on his every word.