01 v. i. To renounce totally a religious belief once professed; to forsake one's church, the faith or principles once held, or the party to which on…
imp. & p. p.
Apostatized; p. pr. & vb. n.
Apostatizing
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1.
To renounce totally a religious belief once professed; to forsake one's church, the faith or principles once held, or the party to which one has previously adhered.“He apostatized from his old faith in facts, took to believing in �emblances.” — Carlyle.