Main Entry: follow up

Function: verb

Date: 1767

transitive verb

1 : to follow with something similar, related, or supplementary <following up his convictions with action — G. P. Merrill>
2 : to maintain contact with (a person) so as to monitor the effects of earlier activities or treatments
3 : to pursue in an effort to take further action <the police are following up leads>intransitive verb : to take appropriate action <follow up on complaints>