[ adjective ] (electronics) designating sound transmission or recording or reproduction over a single channel

[ noun ] (medicine) 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

[ noun ] (medicine) an abnormal increase of mononuclear leucocytes or monocytes in the bloodstream