Quick Definition
I enlarge
Strong's Definition
to widen (literally or figuratively)
Derivation: from G4116 (πλατύς);
KJV Usage: make broad, enlarge
Thayer's Greek Lexicon
πλατύνω; passive, perfect 3 person singular πεπλάτυνται (see μιαίνω); 1 aorist ἐπλατυνθην; (πλατύς); to make broad, to enlarge: τί, Mat_23:5; ἡ καρδία ἡμῶν πεπλάτυνται, our heart expands itself namely, to receive you into it, i. e. to welcome and embrace you in love, 2Co_6:11 (πλατύνειν τήν καρδίαν for μΕα δΔψΐηΔα, to open the heart namely, to instruction, Psalm 118:32 () (cf. Winer's Grammar, 30)); πλατύνθητε καί ὑμεῖς, be ye also enlarged in heart, viz. to receive me therein, 2Co_6:13. (Xenophon, Plutarch, Anthol., others.)
Mounce Concise Greek Dictionary
πλατύνω platynō 3x
to make broad, widen, enlarge, Mat_23:5 ;
pass. met. of the heart, from the Hebrew, to be expanded with kindly and genial feelings, 2Co_6:11 ; 2Co_6:13
Abbott-Smith Greek Lexicon
πλατύνω
( < πλατύς ),
[in LXX chiefly for H7337 hi .;]
to make broad, enlarge, extend: c . acc rei , Mat_23:5 . Metaph . ( cf. Psa_119:32 , al. ), pass ., ἡ καρδία , 2Co_6:11 ; ὑμεῖς , 2Co_6:13 .†
Moulton & Milligan — Vocabulary of the Greek NT
πλατύνω [page 516]
The metaphorical use of this verb = broaden, enlarge, as in 2Co_6:11 ; 2Co_6:13 , finds at least a partial parallel in a fragment of an Index of the Digest, PSI I. 55 .74 (vi/A.D.) δύνατ (αι ) . . . ̣κατ᾽ ἀρχὰς πλατύνεσθ (αι ) ἡ̣ ἀ̣γω (γή ).
Liddell-Scott — Intermediate Greek Lexicon
πλατύνω πλα^τύνω, [Etym: πλατύς] "to widen, make wide", NTest. : —Mid., πλατύνεσθαι γῆν "to widen one's" territory, Xen. :—Pass. "to grow broad, widen out", Anth. : metaph., ἡ καρδία πεπλάτυνται "is opened, enlarged", NTest.
STEPBible — Tyndale Abridged Greek Lexicon
πλατύνω
(πλατύς), [in LXX chiefly for רָחַב hi. ;]
to make broad, enlarge, extend: with accusative of thing(s), Mat.23:5. Metaphorical (cf. Psa.119:32, al.), pass., ἡ καρδία, 2Co.6:11; ὑμεῖς, 2Co.6:13.†
(AS)