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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

object, physical object go
a tangible and visible entity

formation, geological formation go
(geology) the geological features of the earth

depression, natural depression
a sunken or depressed geological formation

noun.object

9 Subcategories

basin go
a natural depression in the surface of the land often with a lake at the bottom of it
bed, bottom go
a depression forming the ground under a body of water
crater go
a bowl-shaped depression formed by the impact of a meteorite or bomb
hole, hollow go
a depression hollowed out of solid matter
lowland go
low level country
sink, sinkhole, swallow hole go
a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
trench, deep, oceanic abyss go
a long steep-sided depression in the ocean floor
trough go
a narrow depression (as in the earth or between ocean waves or in the ocean bed)
valley, vale go
a long depression in the surface of the land that usually contains a river