The Collaborative International Dictionary of English v.0.48:

Discrete \Dis*crete"\, a. [L. discretus, p. p. of discernere.
   See Discreet.]
   1. Separate; distinct; disjunct. --Sir M. Hale.
      [1913 Webster]

   2. Disjunctive; containing a disjunctive or discretive
      clause; as, "I resign my life, but not my honor," is a
      discrete proposition.
      [1913 Webster]

   3. (Bot.) Separate; not coalescent; -- said of things usually
      coalescent.
      [1913 Webster]

   Discrete movement. See Concrete movement of the voice,
      under Concrete, a.

   Discrete proportion, proportion where the ratio of the
      means is different from that of either couplet; as,
      3:6::8:16, 3 bearing the same proportion to 6 as 8 does to
      16. But 3 is not to 6 as 6 to 8. It is thus opposed to
      continued or continual proportion; as, 3:6::12:24.

   Discrete quantity, that which must be divided into units,
      as number, and is opposed to continued quantity, as
      duration, or extension.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Discrete \Dis*crete"\, v. t.
   To separate. [Obs.] --Sir T. Browne.
   [1913 Webster]

WordNet (r) 3.0 (2006):

discrete
    adj 1: constituting a separate entity or part; "a government
           with three discrete divisions"; "on two distinct
           occasions" [syn: discrete, distinct]

The Free On-line Dictionary of Computing (19 January 2023):

discrete

    A description of a quantity whose value is one
   of a fixed set of values, as opposed to a continuous - a
   value capable of infinitessimal variation.  For example,
   integers are discrete values whereas real numbers are
   continuous; digital sound has discrete amplitude leves
   whereas analog sound is continuous.

   (2009-10-08)