1. gradually paying off a debt through regular payments that cover both principal and interest
Usage: British spelling; finance
2. gradually writing off the cost of an asset over a period of time
Usage: British spelling; accounting

Examples

• The company is amortising the loan over twenty years.
• They are amortising their mortgage with monthly payments.
• The business is amortising the equipment costs over five years.
• We’re amortising the development expenses across multiple quarters.
• The bank explained how they would be amortising the principal balance.
• The accountant recommended amortising the patent costs over its useful life.