What does mononucleosis mean?
• MONONUCLEOSIS (noun) The noun MONONUCLEOSIS has 1 sense: 1. an acute disease characterized by fever and swollen lymph nodes and an abnormal increase of mononuclear leucocytes or monocytes in the bloodstream; not highly contagious; some believe it can be transmitted by kissing Familiarity information: MONONUCLEOSIS used as a noun is very rare.