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.
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   2. Disjunctive; containing a disjunctive or discretive
      clause; as, "I resign my life, but not my honor," is a
      discrete proposition.
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   3. (Bot.) Separate; not coalescent; -- said of things usually
      coalescent.
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   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]