Discrete may refer to:

• Discrete particle or quantum in physics, for example in quantum theory

• Discrete device, an electronic component with just one circuit element, either passive or active, other than an integrated circuit

• Discrete group, a group with the discrete topology

• Discrete category, category whose only arrows are identity arrows

• Discrete mathematics, the study of structures without continuity

• Discrete optimization, a branch of optimization in applied mathematics and computer science

• Discrete probability distribution, a random variable that can be counted

• Discrete space, a simple example of a topological space

• Discrete spline interpolation, the discrete analog of ordinary spline interpolation

• Discrete time, non-continuous time, which results in discrete-time samples

• Discrete variable, non-continuous variable

• Discrete pitch, a pitch with a steady frequency, rather than an indiscrete gliding, glissando or portamento, pitch