hold on in WordNet English dictionary

1. hold firmly
   grasp  hold on 
   
2. be persistent, refuse to stop
   "he persisted to call me every night"; "The child persisted and kept asking questions"
   persevere  persist  hang in  hang on  hold on 
   
3. hold the phone line open
   "Please hang on while I get your folder"
   hang on  hold the line  hold on 
   
4. stop and wait, as if awaiting further instructions or developments
   "Hold on a moment!"
   hold on  stop 
   
5. retain possession of
   "Can I keep my old stuffed animals?"; "She kept her maiden name after she married"
   keep  hold on 
   

hold on in English Wiktionary