a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence)
lock up or confine, in or as in a jail;
"The suspects were imprisoned without trial"
"the murderer was incarcerated for the rest of his life"
- Since he escaped from gaol, Tom has been living on a razor's edge, terrified of recapture.
- Strikes by prison officers underline the need for reform in our gaols.