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Webster 1913 Edition

Noun.

[L.

irreligio

: cf. F.

irréligion

. See

not, and

The state of being irreligious; lack of religion; impiety.

Noun.

Want of religion, or contempt of it; impiety.

See also: irréligion

irreligion ‎(usually uncountable, plural irreligions)

The state of being irreligious.
- 1819, Lord Byron, Don Juan, I:
  Lucretius' irreligion is too strong, / For early stomachs, to prove wholesome food […]
- 1967, Theodor R. Sizer, ‎Nicholas Wolterstoff, Religion and Public Education (page 5)
  When we put this idea together with that of the other prescription, we see that what the two together demand is that, with respect to their religions and irreligions, all men shall stand before the government as equals.

irreligion f (plural irreligions)