"to hold no longer as one's own, give up a claim to the exclusive property of," 1610s, back-formation from expropriation, or from earlier adjective (mid-15c.), or from Medieval Latin expropriatus, past participle of expropriare "deprive of property, deprive of one's own," from ex "away from" (see ex-) + propriare "take as one's own," from proprius "one's own" (see proper). Related: Expropriated; expropriating.
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