Amortization/ˌæmərtəˈzeɪʃn/ Definition 1 of 4Pro Tip 1/2Long-Term Commitment Amortization usually means paying off a loan over years, such as a home mortgage. They chose a 15-year mortgage to speed up the amortization. Pro Tip 2/2Interest Impact Early payments mostly cover interest, not the principal loan amount. At first, the amortization schedule showed a small reduction in principal.