Discrete in science is the opposite of continuous: something that is separate; distinct; individual.
Discrete may refer to:
Discrete particle or quantum in physics, for example in quantum theoryDiscrete device, an electronic component with just one circuit element, either passive or active, other than an integrated circuitDiscrete group, a group with the discrete topologyDiscrete category, category whose only arrows are identity arrowsDiscrete mathematics, the study of structures without continuityDiscrete optimization, a branch of optimization in applied mathematics and computer scienceDiscrete probability distribution, a random variable that can be countedDiscrete signal, a time series consisting of a sequence of quantitiesDiscrete space, a simple example of a topological spaceDiscrete spline interpolation, the discrete analog of ordinary spline interpolationDiscrete time, non-continuous time, which results in discrete-time samplesDiscrete pitch, a pitch with a steady frequency, rather than an indiscrete gliding, glissando or portamento, pitch reference