The holy kiss is an ancient traditional Christian greeting, also called the kiss of peace or kiss of charity, and sometimes the "brother kiss", or the "sister kiss". Such greetings signify a wish and blessing that peace be with the recipient, and besides their spontaneous uses they have certain ritualized or formalized uses long established in Christian liturgy.

Christian liturgy is a pattern for worship used by a Christian congregation or denomination on a regular basis. The term liturgy comes from Greek and means "public work". Within Christianity, liturgies descending from the same region, denomination, or culture are described as ritual families.