I'm with First Direct and NatWest and they are a bit different on one:
DR account overdrawn OR debit item
This is important as I've seen a lot of answers to this question elsewhere state that DR simply means you are overdrawn. Certainly doesn't in my case. I think the answers.com list is possibly a bit more accurate. wiki.answers.com/Q/What_do_DR_on_a_bank_statement_mean