D

De marketing
The term is used to emphasize that marketing may be used to decrease as well as increase the number of satisfied customers. It is used to decrease numbers so that an increase in clientele satisfaction can be achieved, through preserving a higher quality experience.
Decentralization
A conscious policy of locating or relocating some parts or the whole of an organization in outlying regions away from metropolitan areas with concomitant developments of infrastructure coupled with extensions of existing residential areas or the establishment of new towns. The policy may aim at the strengthening of specified regional administrative centres.
Deep ecology
The belief that the earth’s resources should be sustained and protected not just for human beings but also for other species. People who believe in this philosophy tend to have a life-centered approach rather than a human-centered approach to managing and sustaining the earth’s resources by working with nature, not wasting resources unnecessarily and interfering with non-human species to meet the needs of humans.
Deep ecology

The belief that the earth’s resources should be sustained and protected not just for human beings but also for other species. 

Destination marketing

Advertising and promotions, aimed at consumer and trade, designed to build awareness and desire to travel to a particular location.

Development
The modification of the biosphere and the application of human, financial, living and non-living resources to satisfy human needs and improve the quality of human life (World Conservation Strategy). The application of human, financial and physical resources to satisfy human needs and improve the quality of life: inevitably development involves modification of the biosphere and some aspects of development may detract from the quality of life locally, regionally, nationally or globally.
Discounted fare

Negotiated air fare for convention, trade show, meeting, group or corporate travel.

Dwell time

The length of time a visitor spends at an attraction or destination. Dwell time is often taken into consideration when setting admission fees as a way of ensuring perceived value for money.