Something is
concrete if it is not
abstract: it is both
particular and an
individual, and (hence?) occupies some space and time. To say that a physical object is concrete is to say, approximately, that it is a particular individual that is located at a particular place and time.
Confusingly, philosophers sometimes refer to trope?s, or property-instances (e.g., the particular redness of this particular apple), as '[abstract particular]?s'.
See particular; individual; abstract.
/Talk
Concrete is a building material made from sand, water, and limestone that in a mostly liquid form and that eventually dries out into a stone.