the reduction of economic activity or property values in a particular area resulting from expected or possible future development or restriction of development.

the reduction in marketability and value of land as a result of a public sector decision.

land, the value of which, is adversely affected by a proposal contained in a development plan by a public authority.

a situation in which land becomes unsaleable or reduced in value because it is required for, or adversely affected by, a public or private project.