noun Date: 1941 a person and especially a relative whom one knows well enough to kiss more or less formally upon meeting, one that is closely related in kind to something else
KISSING COUSIN
Meaning of KISSING COUSIN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012