APOSTATE
apostate
(adjective) not faithful to religion or party or cause
deserter, apostate, renegade, turncoat, recreant, ratter
(noun) a disloyal person who betrays or deserts his cause or religion or political party or friend etc.
Source: WordNet® 3.1
Etymology
Adjective
apostate (not comparable)
Guilty of apostasy.
Noun
apostate (plural apostates)
A person who has renounced a religion or faith.
(Roman Catholicism) One who, after having received sacred orders, renounces his clerical profession.
Synonyms
• deconvert
• recreant
• withersake
• murtad
Source: Wiktionary
A*pos"tate, n. Etym: [L. apostata, Gr. Apostasy.]
1. One who has forsaken the faith, principles, or party, to which he
before adhered; esp., one who has forsaken his religion for another;
a pervert; a renegade.
2. (R. C. Ch.)
Definition: One who, after having received sacred orders, renounces his
clerical profession.
A*pos"tate, a.
Definition: Pertaining to, or characterized by, apostasy; faithless to
moral allegiance; renegade.
So spake the apostate angel. Milton.
A wretched and apostate state. Steele.
A*pos"tate, v. i. Etym: [L. apostatare.]
Definition: To apostatize. [Obs.]
We are not of them which apostate from Christ. Bp. Hall.
Source: Webster’s Unabridged Dictionary 1913 Edition