reg

plural regs

1. informalA regular.

   I've been going to that chat room for months, and I know most of the regs by now.

2. informalA regulation.

   1 more example

   It makes me sad to see a prisoner complain about another prisoner not writing. His or her mailroom (or yours!) might have just tossed the letter; besides the rules and regs for prisoners writing each other are different in every state, and may change for no reason. Or, the rules may be ignored (especially for gay prisoners) also, even prisons that do accept mail from other prisoners, may not deliver it to people in isolation or on certain security levels.

   1990 December 16, “Prisoners Writing Prisoners”, in Gay Community News, volume 18, number 22, page 18

3. registrar
4. registration
   1. UKabbreviationclippinginformalClipping of registration number.

      What's your reg and where are you parked?

5. registry
6. computingregister

plural regs

1. countableuncountablegeographyA hard surface of rock fragments set in a sandy matrix, found in some hot deserts; regolith, stony desert.

   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

   Synonyms: hammada, serir, yardang, desert pavement

1. A diminutive of the male given name Reginald.