Definition of "keep up" in English

Verb

1. To maintain; to preserve; to prevent from deteriorating or falling.

2. To continue with (work, etc).

3. To stay even or ahead.

   • They ran so fast I could hardly keep up.

4. To ensure that one remains well-informed about something.

   • I always try to keep up with (or "keep up on") current affairs.

5. To prevent someone from going to bed or to sleep

   • The crying baby kept me up all night

6. To use capital letters as much as reasonable.