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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

location go
a point or extent in space

space go
an empty area (usually bounded in some way between things)

opening, gap go
an open or empty space in or between things

hole go
an opening into or through something

aperture
a natural opening in something

noun.object

3 Subcategories

pupil go
the contractile aperture in the center of the iris of the eye
micropyle go
minute opening in the wall of an ovule through which the pollen tube enters
pore, stoma, stomate go
a minute epidermal pore in a leaf or stem through which gases and water vapor can pass