What it means

1. verb appear in a show, on T.V. or radio
   “The news won't be on tonight”
2. verb grow late or (of time) elapse
   “It is getting on midnight--let's all go to bed!”
3. verb get on board of (trains, buses, ships, aircraft, etc.)
4. verb grow old or older
   “She aged gracefully”
5. verb have smooth relations
   “My boss and I get along very well”
6. verb get up on the back of
   “mount a horse”
7. verb develop in a positive way
   “He progressed well in school”