1) Abbreviation on a sale item 2) Bargain basement letters 3) Clothing label warning 4) Discount letters 5) Discount rack shorthand 6) Factory sec 7) Flawed, on store mdse 8) Kind of verb 9) Label in seconds 10) Letters on seconds 11) Letters on some as-is mdse 12) Like auxiliary vbs 13) Like buy, sell and other vbs 
The discount rate at which the net present value is zero....more on IRR
Internal rate of return
See: Internal rate of returnThe ISO 4217 currency code for the Iranian Rial.
Internal Rate of Return - the discount rate at which the present value of the future cash flows of an investment is equal to the cost of the investment. When IRR is greater than the required return the investment is acceptable.
International Radio Regulations
internal rate of return
Is used two different ways. For the first, it refers to the Internal Rate of Return. For the second, it refers to Implied Repo Rate. 
Individual Ready Reserve, branch of the reserve that most former servicemembers fall under upon the end of active service, may be called to involuntarily return to active status.
Iran
Internal Rate of Return (finance)
Internal Rate of Return. The discount rate which would be need to be applied to a series of future cashflows in order for the Net Present Value to be equal to the capital investment.