I. ˈfä-lō-ˌəp noun
Date: 1916
1.
a. : the act or an instance of following up
b. : something that follows up
2. : maintenance of contact with or reexamination of a person (as a patient) especially following treatment
3. : a news story presenting new information on a story published earlier
II. adjective
Date: 1912
1. : of, relating to, or being something that follows up
follow-up action by the police — Frank Faulkner
2. : done, conducted, or administered in the course of following up persons
follow-up care for discharged hospital patients