A UAed post is no longer visible to members. Short for unapproved. Posts in a UAed state are visible only to mods within their forum, sr mods and admins. Usually UAed posts are rule breaking, off topic, give unhelpful or dangerous advice, etc. Its a tool mods use to help keep discussions productive and strife and noise to a minimum.
Edit: From a members point of view you could go ahead and think delete. True deletion or a hard delete doesn't happen often on discussion boards because record keeping, accountability, and the opportunity to reverse error are impeded by hard deletes.
Thanks for correction kokomo unauthorize to unapprove
^^ in other words no posts actually "deleted" even if they delete the post they still use teh restore feature to bring it back tho senior staff can delete ur posts permanently.