concrete
Real, actual, tangible.
(category theory, of a category) Analogous to the categories of algebraic objects which category theory was created to generalize, in the sense of having objects which can be thought of as sets equipped with some additional structure. Formally, equipped with a faithful functor to the category of sets.
(by extension, topos theory, of a category C with respect to another category X) Equipped with a faithful functor to X (called a base category), in which case C is called a concrete category over X.
Being or applying to actual things, rather than abstract qualities or categories.
The closer it comes to becoming concrete the more abstract it seems. Things get very abstract. The concrete room was the sum of abstract facts. Are facts abstract, or are they just abstract representations of concrete things?
Particular, specific, rather than general.
"How did you like my reading of the character, gentlemen?" said Mr. Waldengarver, almost, if not quite, with patronage. Herbert said from behind (again poking me), "massive and concrete." So I said boldly, as if I had originated it, and must beg to insist upon it, "massive and concrete."
"Anyhow, he gives large parties," said Jordan, changing the subject with an urban distaste for the concrete. "And I like large parties. They're so intimate. At small parties there isn't any privacy."
To German intelligence, Major —— de Coverley was a vexatious enigma; not one of the hundreds of American prisoners would ever supply any concrete information about the elderly white-haired officer with the gnarled and menacing brow and blazing, powerful eyes who seemed to spearhead every important advance so fearlessly and successfully.
Made of concrete (building material).
Few people passed. The man out of the last house passed on his way home; she heard his footsteps clacking along the concrete pavement and afterwards crunching on the cinder path before the new red houses.
(obsolete) Made up of separate parts; composite.
(obsolete) Not liquid or fluid; solid.
A building material created by mixing cement, water, and aggregate such as gravel and sand.
Smooth facets of buildings have given way to cobbly insides of concrete blasted apart, all the endless-pebbled rococo just behind the shuttering.
(logic) A term designating both a quality and the subject in which it exists; a concrete term.
(US) A dessert of frozen custard with various toppings.
(perfumery) An extract of herbal materials that has a semi-solid consistency, especially when such materials are partly aromatic.
(possibly obsolete) Sugar boiled down from cane juice to a solid mass.
(obsolete) Any solid mass formed by the coalescence of separate particles; a compound substance, a concretion.
To cover with or encase in concrete (building material).
To solidify: to change from being abstract to being concrete (actual, real).
[…] the necessity of recognizing this relation outwardly and of perfecting herself in the forms required to express the recognition, had moved her to such diligence and faithfulness in practicing these forms that this exercise soon concreted itself into habit; it became automatic and unconscious; then a natural result followed: […]
(archaic) To unite or coalesce into a solid mass.
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