There are multiple definitions - click on the translation that matches your context.

(kamat vagy visszafizetés megkezdésének) rögzített időtartam(a)

főnév

full

lock in period

noun

Definitions of lock in period

English

the time period during which a borrower may not start repaying a loan without paying penalties

Make sure you have time to send in your cancellation form to your current bank and avoid prepayment penalties should you refinance before the lock-in period is over.

English

the time period for which a lender has agreed with the borrower to hold a certain interest rate unchanged

Lenders that charge rate lock fees generally charge higher fees for longer lock-in periods.