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Webster 1913 Edition

Verb.

To liberate from prison.

[R.]

Harvey.

Verb.

[dis and incarcerate.] To liberate from prison; to set free from confinement. [Not much used.]

disincarcerate ‎(third-person singular simple present disincarcerates, present participle disincarcerating, simple past and past participle disincarcerated)

liberate from prison