Source : Webster's Revised Unabridged Dictionary (1913)

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.

            The first concrete state, or consistent surface, of
            the chaos must be of the same figure as the last
            liquid state.                         --Bp. Burnet.

   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.

                Concrete is opposed to abstract. The names of
                individuals are concrete, those of classes
                abstract.                         --J. S. Mill.

                Concrete terms, while they express the quality,
                do also express, or imply, or refer to, some
                subject to which it belongs.      --I. Watts.

   {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.