landform

any conspicuous topographic feature on the Earth or a similar planetary body or satellite. Familiar examples are mountains (including volcanic ...
Found on http://www.britannica.com/eb/a-z/l/12

landform

The shape, size, form, nature, and characteristics of a specific feature of the land's surface, whether above ground or underwater. The term geomorphology is used to describe the study of landforms
Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0097878.html

Landform

A landform is a geomorphological unit, and is largely defined by its surface form and location in the landscape. As part of the terrain a landform is an element of topography. Landform elements also include land such as hills, mountains, plateaus, canyons, valleys, seascape and oceanic waterbody interface features such as bays, peninsulas, seas an...
Found on http://en.wikipedia.org/wiki/Landform

Landform

Any feature of the earth's surface having a distinct shape and origin. Landforms include major features (such as continents, ocean basins, plains, plateaus, and mountain ranges) and minor features (such as hills, valleys, slopes, drumlins, and dunes). Collectively, the landforms of the earth constitute the entire surface configuration of the planet...
Found on http://www.evcforum.net/WebPages/Glossary_Geology.html
No exact match found