A tabernacle was originally a Jewish place of worship, like a moveable tent. Synagogues and temples are tabernacles. Tabernacle has now branched out and can refer to a place of worship for Christians, too.
The tabernacle has a long history in the Jewish faith. Originally, a tabernacle was a tent said to contain the Ark of the Covenant. The word comes from the Latin tabernaculum for "tent.” Later, it came to mean a place Jews worship, like Christians worship in a church. Like a church, a tabernacle is a holy place where you will find people worshiping. These days, the word tabernacle is used by others, like in the Mormon Tabernacle Choir, for example.