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jail
(British also gaol)

noun
a place for the confinement of people accused or convicted of a crime:
〖通例無冠詞で〗刑務所(prison) (!⦅英⦆ の公文書でgaolが多いほかはjailが普通) ; ⦅主に米⦆ 拘置所, 留置所; U拘置, 投獄
e.g. he served 15 months in jail
e.g. as modifier : a jail sentence.

verb with object (usually be jailed)
put (someone) in jail:
«…の罪で» 〈人が〉投獄[拘置]される «for»
e.g. the driver was jailed for two years.

USAGE
see usage at prison.
>In North America, prison specifically denotes a facility run by the state (in Canada provincial) or federal government for those who have been convicted of serious crimes, whereas jail denotes a locally run facility for those awaiting trial or convicted of minor offenses.

ORIGIN
Middle English: based on Latin cavea (see cage). The word came into English in two forms, jaiole from Old French and gayole from Anglo-Norman French gaole (surviving in the spelling gaol), originally pronounced with a hard g, as in goat.