self-quarantine /ˌsɛlfˈkwɒɹəntiːn/noun 1verb 1forms 3 noun1 •Isolation by avoiding physical contact with other individuals, especially in order to reduce the transmission of a contagious disease.Eleven city firefighters have tested positive, and more than 50 are in self-quarantine. — 2020 verb1 •To refrain from physical contact with other individuals, especially in order to reduce the transmission of a contagious disease.He said that he became sick with relatively mild symptoms about a week ago and self-quarantined at his home. — 2020 formsself-quarantined · self-quarantining · self-quarantines