"imprisonment" in the noun sense
1. imprisonment
putting someone in prison or in jail as lawful punishment
2. captivity, imprisonment, incarceration, immurement
the state of being imprisoned
"he was held in captivity until he died"
"the imprisonment of captured soldiers"
"his ignominious incarceration in the local jail"
"he practiced the immurement of his enemies in the castle dungeon"
3. imprisonment, internment
the act of confining someone in a prison (or as if in a prison)
Source: WordNet® (An amazing lexical database of English)
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