Inelastic demand is a term used to describe the unchanging quantity of a good or service when its price changes.

An elastic demand curve means that a change in price has a large effect on buying, while an inelastic demand curve means that a price change has less effect on buying.

Relatively elastic demand means you can expect more change in demand than in the price of a product or service. Perfectly inelastic demand means that demand remains constant regardless of price.

An elastic economic factor changes relatively easily in relation to a change in another factor. An inelastic economic factor changes very little when another element is significantly altered.