Meaning ofcatch up within English

Verb

1. to be updated on news; informed
   I'll catch up with the latest news on the internet.
2. to update someone on news; inform them
   My friend will catch us up with what we missed.
3. to overtake someone or something after a delay; reach the same level or position
   The faster runner will catch up with the leader soon.
4. to reach or overtake something ahead
   The train will catch up with the schedule after the delay.
5. to compensate for a deficiency; make up lost time
   The company will catch up with the demand by increasing production.