God’s dwelling-place with men, the mishkan. In the Old Testament it was the Tabernacle of Moses, set up in a tent so that when the Israelites traveled, they could carry it with them. “And let them make me a sanctuary, that I may dwell in their midst” Ex 25:8.
In the New Testament, “But when Christ appeared as a high priest of the good things that have come, then through the greater and more perfect tent (not made with hands, that is, not of this creation) he entered once for all into the Holy Place, taking not the blood of goats and calves but his own blood, thus securing an eternal redemption” Heb 9:11–12.
In Hebrew a tabernacle is also heikhal, from the root mkhl, container. A true Tabernacle is a container holding the Shkhina, the Presence of God. It can be a beautiful container such as Jews use to hold the sefer torah. When Solomon built the Temple it was called beit hamikdash, House of Holiness, from the root kdsh, holy.
In a Catholic parish church, the Tabernacle is the place where the Real Presence of Rabbi Yeshua is kept when he is not on the altar.