Answer: Apportioning costs between two or more periods
Amortization, also known as Depreciation, is the process of allocating the cost of a capital asset (Property, Plant, and Equipment) to expense over their useful life (service) in a rational and systematic manner. Amortization is a process of cost allocation, not a process of asset valuation. (Accounting Principles, Canadian Edition, volume 1, by Weygandt, Kieso, and Trenholm, page 419).