catch up

Short definition from Wiktionary

Verb

1. 1
   To pick up suddenly.
2. 2
   To entangle (something).
3. 3
   To involve in (something).
4. 4
   To be brought up to date with news.
5. 5
   To bring (someone) up to date with the news.
6. 6
   To reach something that had been ahead.
7. 7
   To compensate for or make up a deficiency.
8. 8
   To finally overtake (someone or something) after a long period of approaching (them or it).

Noun

1. 1
   Alternative spelling of catch-up.
2. 2
   An act of catching up or attempting to catch up.
3. 3
   An amount, a thing, or a receipt or repetition of information that enables one to catch up.