From WordNet (r) 2.0 (August 2003) [wn]:
concrete
adj 1: capable of being perceived by the senses; not abstract or
imaginary; "concrete objects such as trees" [ant:
abstract]
2: formed by the coalescence of particles
n : a strong hard building material composed of sand and gravel
and cement and water
v 1: cover with cement; "concrete the walls"
2: form into a solid mass; coalesce
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Concrete \Con"crete\ (? or ?), a. [L. concretus, p. p. of
concrescere to grow together; con- + crescere to grow; cf. F.
concret. See Crescent.]
1. United in growth; hence, formed by coalition of separate
particles into one mass; united in a solid form.
[1913 Webster]
The first concrete state, or consistent surface, of
the chaos must be of the same figure as the last
liquid state. --Bp. Burnet.
[1913 Webster]
2. (Logic)
(a) Standing for an object as it exists in nature,
invested with all its qualities, as distinguished from
standing for an attribute of an object; -- opposed to
abstract. Hence:
(b) Applied to a specific object; special; particular; --
opposed to general. See Abstract, 3.
[1913 Webster]
Concrete is opposed to abstract. The names of
individuals are concrete, those of classes
abstract. --J. S. Mill.
[1913 Webster]
Concrete terms, while they express the quality,
do also express, or imply, or refer to, some
subject to which it belongs. --I. Watts.
[1913 Webster]
Concrete number, a number associated with, or applied to, a
particular object, as three men, five days, etc., as
distinguished from an abstract number, or one used without
reference to a particular object.
Concrete quantity, a physical object or a collection of
such objects. --Davies & Peck.
Concrete science, a physical science, one having as its
subject of knowledge concrete things instead of abstract
laws.
Concrete sound or movement of the voice, one which slides
continuously up or down, as distinguished from a
discrete movement, in which the voice leaps at once from
one line of pitch to another. --Rush.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Concrete \Con"crete\, n.
1. A compound or mass formed by concretion, spontaneous
union, or coalescence of separate particles of matter in
one body.
[1913 Webster]
To divide all concretes, minerals and others, into
the same number of distinct substances. --Boyle.
[1913 Webster]
2. A mixture of gravel, pebbles, or broken stone with cement
or with tar, etc., used for sidewalks, roadways,
foundations, etc., and esp. for submarine structures.
[1913 Webster]
3. (Logic) A term designating both a quality and the subject
in which it exists; a concrete term.
[1913 Webster]
The concretes "father" and "son" have, or might
have, the abstracts "paternity" and "filiety". --J.
S. Mill.
[1913 Webster]
4. (Sugar Making) Sugar boiled down from cane juice to a
solid mass.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Concrete \Con*crete"\, v. i. [imp. & p. p. Concreted; p. pr &
vb. n. Concreting.]
To unite or coalesce, as separate particles, into a mass or
solid body.
[1913 Webster]
Note: Applied to some substances, it is equivalent to
indurate; as, metallic matter concretes into a hard
body; applied to others, it is equivalent to congeal,
thicken, inspissate, coagulate, as in the concretion of
blood. "The blood of some who died of the plague could
not be made to concrete." --Arbuthnot.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Concrete \Con*crete"\, v. t.
1. To form into a mass, as by the cohesion or coalescence of
separate particles.
[1913 Webster]
There are in our inferior world divers bodies that
are concreted out of others. --Sir M. Hale.
[1913 Webster]
2. To cover with, or form of, concrete, as a pavement.
[1913 Webster]