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.
Credit â CR. Definition: An accounting entry that may either decrease assets or increase liabilities and equity on the company's balance sheet, depending on the transaction. When using the double-entry accounting method there will be two recorded entries for every transaction: a credit and a debit.redit â CR. Definition: An accounting entry that may either decrease assets or increase liabilities and equity on the company's balance sheet, depending on the transaction. When using the double-entry accounting method there will be two recorded entries for every transaction: a credit and a debit.