keep time

Short definition from Wiktionary

Verb

1. 1
   To measure time.
2. 2
   To indicate the time correctly (of a timepiece).
3. 3
   To make any regular rhythmical movements at the same time with others.
4. 4
   To control the beat or rhythm of a song played by a music group.
5. 5
   To maintain a schedule set out in a timetable. (e.g. of a train)