infectious mononucleosis
noun
: an acute infectious disease associated with Epstein-Barr virus that is characterized especially by fever, sore throat, swelling of lymph nodes, fatigue, and lymphocytosis and occurs primarily in adolescents and young adults —abbreviation IM
called also kissing disease, mono
Example Sentences
Recent Examples on the Web There are other viral illnesses that produce a post-viral fatigue syndrome, such as infectious mononucleosis, often referred to as mono, which is more commonly caused by the Epstein-Barr virus. 
Los Angeles Times, 26 July 2022 At least one out of four teenagers and young adults who get infected with EBV will develop infectious mononucleosis, according to the CDC. Robyn Merrett, PEOPLE.com, 27 Oct. 2021 Some scientists, like immunologist Dr. Nancy Klimas, wonder if long COVID is caused by old viruses that stay in the body but are typically held in check, like infectious mononucleosis. Dr. Maia Ou, ABC News, 13 Mar. 2021 Usually benign, the virus can be associated with serious diseases like infectious mononucleosis, Hodgkin’s lymphoma and multiple sclerosis. Brian Handwerk, Smithsonian, 17 Dec. 2019 The final, official diagnosis was the Epstein-Barr virus, also known as infectious mononucleosis. Théoden Janes, charlotteobserver, 11 Mar. 2018
Los Angeles Times, 26 July 2022 At least one out of four teenagers and young adults who get infected with EBV will develop infectious mononucleosis, according to the CDC. Robyn Merrett, PEOPLE.com, 27 Oct. 2021 Some scientists, like immunologist Dr. Nancy Klimas, wonder if long COVID is caused by old viruses that stay in the body but are typically held in check, like infectious mononucleosis. Dr. Maia Ou, ABC News, 13 Mar. 2021 Usually benign, the virus can be associated with serious diseases like infectious mononucleosis, Hodgkin’s lymphoma and multiple sclerosis. Brian Handwerk, Smithsonian, 17 Dec. 2019 The final, official diagnosis was the Epstein-Barr virus, also known as infectious mononucleosis. Théoden Janes, charlotteobserver, 11 Mar. 2018 Word History
First Known Use
1915, in the meaning defined above
Medical Definition
infectious mononucleosis
noun
: an acute infectious disease associated with Epstein-Barr virus that is characterized especially by fever, sore throat, swollen lymph nodes, fatigue, and lymphocytosis and occurs primarily in adolescents and young adults —abbreviation IM
called also glandular fever, kissing disease, mono