General
seg
What does seg mean?
Solitary confinement, clipped from 'administrative segregation' (ad-seg). The official-sounding cousin of 'the hole' — same isolation cell, same lockdown, just dressed up in DOC paperwork. Used by both inmates and staff.
"She's been in seg for two months pending the investigation."
Origin
Shortening of 'segregation' (administrative segregation / ad-seg), the formal corrections term for isolation housing.
Frequently asked questions
What does seg mean in prison slang?
Seg means solitary confinement — it's short for administrative segregation.
How do you use seg in a sentence?
"He got thrown in seg for a month after the fight."
Where does the term seg come from?
It's shorthand for "administrative segregation," the formal name for solitary confinement.
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