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Webster 1913 Edition

Noun.

The act of impropriating;

as, the

impropriation

of property or tithes

; also, that which is impropriated.

(Eng. Eccl. Law)

(a)

The act of putting an ecclesiastical benefice in the hands of a layman, or lay corporation.

(b)

A benefice in the hands of a layman, or of a lay corporation.

Noun.

The act of putting an ecclesiastical benefice into the hands of a layman.

The benefice impropriated.

impropriation ‎(plural impropriations)

The act of impropriating; putting an ecclesiastical benefice or tithes in the hands of a layman, or lay corporation.
- Bishop Joseph Hall
  […] this practice of impropriation, which was first set on foot by unjust and sacrilegious bulls from Rome, is justly offensive both to God and good men; as misderiving the well-meant devotions of charitable and pious souls into a wrong channel.
- 1971, Keith Thomas, Religion and the Decline of Magic, Folio Society 2012, p. 95:
  His first work […] attacked the impropriation of tithes by laymen and emphasised the divine punishments customarily inflicted upon the sacrilegious.
A benefice, tithe etc. that has been put in lay hands.