Definition of ironclad. 1  1 : sheathed in iron armor âused especially of naval vessels. 2  2 : so firm or secure as to be unbreakable: such asa : binding an ironclad oathb : having no obvious weakness an ironclad case against the defendant.
Best Answer: CR means a credit. If this appears on the balance due line of your statement, it means that you owe nothing and that you are that much ahead of future charges and no payment or acknowledgment is needed.
Why Dr and Cr for debits and Credits. As far as my knowledge is concerned Dr = Debit Record and CR = Credit Record. Credit abbreviation. The only abbreviation I have ever seen anywhere is Cr. An alternative for debits I have seen is Db.