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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

whole, unit go
an assemblage of parts that is regarded as a single entity

artifact, artefact go
a man-made object taken as a whole

way go
any artifact consisting of a road or path affording passage from one place to another

passage go
a way through or along which someone or something may pass

passageway go
a passage between rooms or between buildings

tunnel
a passageway through or under something, usually underground (especially one for trains or cars)

noun.artifact

3 Subcategories

catacomb go
an underground tunnel with recesses where bodies were buried (as in ancient Rome)
railroad tunnel go
a tunnel through which the railroad track runs
subway, underpass go
an underground tunnel or passage enabling pedestrians to cross a road or railway