Term explained
Your term is the contract window. When it ends, the mortgage reaches its maturity date and you must renew, refinance, or pay off the remaining balance. During the term your rate is locked (on a fixed-rate mortgage) or moves with the lender's prime rate (on a variable-rate mortgage), and the prepayment privileges and penalties set out in your agreement apply.
A single amortization period usually spans several terms. For example, a 25-year amortization might be made up of five consecutive 5-year terms, with the borrower renewing and possibly renegotiating the rate at the end of each one. Choosing a term length is a balance between rate certainty, flexibility, and the cost of breaking the contract early.