Instances are dungeons and special areas in World of Warcraft which many copies can exist at once. An instance allows many groups of players to traverse the same geography and battle the same enemies at the same time, without interfering with each other. Instances are accessible by a swirling portal. They may be blocked by a locked door which requires a key.
Instances were made as a way so solve a set of related problems which had become obvious. Everyone wants to slay the hardest monsters and get the best loot, but having the whole server at the very same spot at the same time would've crashed the server.
In World of Warcraft you can find instances such as Naxx and BWL.
d00d1: LFG any high lvl instance.
d00d2: d00d1, join us! we're going to UBRS ;)
Short for Ahn'Qiraj. A high level raid instance in World of Warcraft. Can be found in southern Silithus. Contains bosses such as Skeram, Sartura, Fankriss, Huhuran, Twin Emperors, C'thun, bug trio, Ouro and Viscidus.
Zomg, that shaman has gathered the whole Stormcaller set. He must have been alot in AQ -.-