Definitions for "Rate lock-in"
See "interest rate lock".
A rate lock-in is a written agreement which guarantees the borrower a specified interest rate, provided the loan closes within a set period of time.
A guarantee that the interest rate will remain the same for a specified period of time. Whether the loan's interest rate index rises or falls during that period, the borrower pays the rate that was current at the time of the lock-in agreement.