Lexical Definition

‎ἀποκαλύπτω‎ apokalýptō (ap-ok-al-oop'-to) to reveal ^G:V
from ‎ἀπό‎ and ‎καλύπτω‎

reveal.

• to take off the cover, i.e. disclose

Abbott-Smith

ἀπο-καλύπτω, [in LXX chiefly for גּלה;]
1. in general sense (cl.), to reveal, uncover, disclose,
(a) of things: Mt 10:26, Lk 2:35 12:2, I Co 3:13;
(b) of persons: pass., Christ, Lk 17:30; Antichrist, II Th 2:3, 6, 8.
2. In LXX and NT, in special sense of divine revelation: Mt 11:25 (on the tense, v. M, Pr., 136), Mt 11:27 16:17, Lk 10:21, 22, Jo 12:38, Ro 1:17, 18 8:18, I Co 2:10 14:30, Ga 1:16 3:23, Eph 3:5, Phl 3:15, I Pe 1:5, 12 5:1 (Westc., Eph., 178 f.; M, Th., 149 f.).†
SYN.: φανερόω (v. Thayer, 62; Cremer, 342).†

Abbott-Smith References

Liddell-Scott-Jones

ἀποκαλύπτω-κᾰλύπτω,

aorist 2 passive -καλύφην[Refs 3rd c.AD+], etc.:—uncover, τὴν κεφαλήν[Refs 5th c.BC+]:—in passive, of land left cultivable by the Nile [ἀποκαλύπτωκάλυφος—, ἀρούρας β ἀποκαλύπτωκαλυφείσης.. αἰγιαλοῦ “PIand.” 27.12, compare 27.60 (1st-2nd c.AD)">Refs 1st c.AD+]:—middle, ἀποκαλύπτωκαλύπτεσθαι τὴν κεφαλήν[Refs 1st c.AD+]

__2 disclose, reveal, τόδε τῆς διανοίας[Refs 5th c.BC+]:—middle, reveal one's whole mind, [Refs 1st c.AD+]:—in passive, [LXX]; ἀποκαλύπτωκαλύπτεσθαι πρός τι letone's designs upon a thing become known, [Refs 1st c.BC+]:—passive, to be made known, [NT]; of persons, [NT]; λόγοι ἀποκαλύπτωκεκαλυμμένοι naked, i.e. shameless, words, Ps.-[Refs 1st c.AD+]
__3 unmask, τινά[Refs 2nd c.AD+]
__II of the epiglottis, raise, [Refs 4th c.BC+]

_{LSJ Scripture Refs: LXX.1Kgs.2.27 ☩ Matt.10.26 ☩ 2Thess.2.3}