Yichudim are contemplative practices, developed especially by Luria, in which the practitioner combines and meditates on divine names to bring about the union of the Holy One and the Shekhinah. Many prayers are preceded by a formula declaring them done for the sake of this unification.
Yichudim
Unifications: kabbalistic meditations on divine names to unite the sefirot and the Shekhinah.
Also: unifications