Financial terms - amortization

What it means...
1. The paying off of debt in regular installments over a period of time.
2. The deduction of capital expenses over a specific period of time (usually over the asset's life). More specifically, this method measures the consumption of the value of intangible assets, such as a patent or a copyright.

Investopedia says...
Suppose XYZ Biotech spent $30 million dollars on a piece of medical equipment and that the patent on the equipment lasts 15 years, this would mean that $2 million would be recorded each year as an amortization expense.While amortization and depreciation are often used interchangeably, technically this is an incorrect practice because amortization refers to intangible assets and depreciation refers to tangible assets.

Details here.

What is the difference between amortization and depreciation?

Amortization usually refers to spreading an intangible asset's cost over that asset's useful life. For example, a patent on a piece of medical equipment usually has a life of 17 years. The cost involved with creating the medical equipment is spread out over the life of the patent, with each portion being recorded as an expense on the company's income statement.

Depreciation, on the other hand, refers to prorating a tangible asset's cost over that asset's life. For example, an office building can be used for a number of years before it becomes run down and is sold. The cost of the building is spread out over the predicted life of the building, with a portion of the cost being expensed each accounting year.

Depletion refers to the allocation of the cost of natural resources over time. For example, an oil well has a finite life before all of the oil is pumped out. Therefore, the oil well's setup costs are spread out over the predicted life of the oil well.