Quick Definition
παραφρονέω v. I am out of my senses
Strong's Definition
from 3844 and 5426; to misthink, i.e. be insane (silly)
KJV Usage: as a fool
UBS Dictionary of the Greek New Testament
verb | φρονέω
30.24 · Think · To Think, Thought
to not be in one’s right mind, to be insane, to be mad, to be out of one’s mind, insanity, madness to think or reason in a completely irrational manner
1 It is possible that there are some significant differences in meaning between the set μαίνομαι / μανία and the set παραφρονέω / παραφρονία, but the difference is likely to be more connotative than denotative, as, for example, the distinction in English between crazy and insane.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
παρα-φρονέω, -ῶ ; (παράφρων [fr. rapa (q. ν. IV. 2) and φρήν, ‘beside one’s wits’]) ; to be beside one’s self, out of one’s senses, void of understanding, insane: 2 Co. xi. 23. (From Aeschyl. and Hdt. down; once in Sept., Zech. Vii. 11.)
Mounce Concise Greek Dictionary
παραφρονέω paraphroneō 1x
to be beside one’s wits; παραφρονῶν, in foolish style, 2 Cor. 11:23*
Abbott-Smith Greek Lexicon
παρα-φρονέω
(< παρά, φρήν), [in LXX: Za 7:11 (סרר)*;]
to be beside oneself, be deranged: II Co 11:23.†
Moulton & Milligan — Vocabulary of the Greek NT
παραφρονέω. With 2 Cor 1138 παραφρονῶν λαλῶ, ‘I am talking like a madman,” we may compare the account, written at earliest about A.D. 200, of the trial of an Alexandrian gymnasiarch before the Emperor Claudius, Chrest. I. rqiii 14, where the condemned man scornfully asks—rot(=rl) γὰρ ἄλλο ἔχομεν εἰ (= ἢ) παρα[φ]ρονοῦντι βασιλεῖ τόπον διδόναι ; ‘for what else is there to do except to give way to a mad king?” ἸΠαραφροσύνη is similarly attributed to the Emperor Gaius Caligula in Jos. Antt. XIX. 284 (v. 2) τοῦ διὰ τὴν πολλὴν ἀπόνοιαν Kal παραφροσύνην, ὅτι μὴ παραβῆναι ἠθέλησεν τὸ ᾿Ιουδαίων ἔθνος τὴν πάτριον θρησκείαν καὶ θεὸν προσαγορεύειν αὐτόν, ταπεινώσαντος αὐτούς.
Liddell-Scott-Jones — Greek-English Lexicon
παραφρονέω (paraphroneō) — be insane. παραφρον-έω, to be beside oneself, deranged, [Refs 5th c.BC+]: poetry παραιφρ- [Refs 3rd c.BC+]
2. to be delirious, variant in [Refs 5th c.BC+]. παραφρόν-ησις, εως, ἡ, ={παραφροσύνη}, [LXX+5th c.BC+] middle in [Refs]