Definition of "reg"

reg¹

/ɹɛd͡ʒ/

noun
plural regs
1. (informal) A regular.
2. (informal) A regulation.
3. registrar
4. registration
5. registry

reg²

/ɹɛɡ/

noun
countable and uncountable, plural regs
1. (geography) A hard surface of rock fragments set in a sandy matrix, found in some hot deserts; regolith, stony desert.
  Quotations
  As I say for half a mile round the fort it is rutted gravel. We call this sort of gravelly stuff reg.
  1988, Robert Irwin, The Mysteries of Algiers, Dedalus, published 1993, page 66