Meaning of MUMPS in English

noun plural but singular or plural in construction Etymology: from plural of obsolete mump grimace Date: 1598 an acute contagious virus disease caused by a paramyxovirus (species Mumps virus of the genus Rubulavirus ) and marked by fever and by swelling especially of the parotid gland

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.