"union"-the brief seclusion of the bride and groom immediately after the wedding ceremony

Yichud in Halakha (Jewish religious laws) refer to forbidden seclusion between a man and a woman, who are not married to each other, in a closed room or a private area. This prohibition is to prevent the two from coming to sin.

Unity; specifically, the realm of unity composed of Adam Kadmon and Atzilut.

("unification"): 1. A Yichud is a type of tikun in which one does not need to separate good from evil but rather focus one's consciousness on the inherent spiritual unity between two apparently disparate concepts. See birur. 2. (pl. yichudim): A specific spiritual exercise of this nature. 3.The spiritual state associated with the sefirah of Da'at. For further explanation see: The Powers of the Soul-- Yichud.