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Discrete means as opposed to continuous. For instance, people may ask questions about discrete electric charges, discrete spacetime, discrete energies, etc. If discretization is vital/essential to the question, then tag it with this tag.

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Space-time in String Theory

In other words, can strings move continuously through space, or are there a discrete set of locations where strings can be, and does string theory rule out one of the options? … Should I think of the spin networks in LQG as describing a discrete space-time? Thanks for your insight, or any references you may be able to provide! …
Álvaro Lozano-Robledo's user avatar