Quick Definition
I pour out so that it overflows
Strong's Definition
to pour out over, i.e. (passively) to overflow
Derivation: from G5228 (ὑπέρ) and the alternate form of G1632 (ἐκχέω);
KJV Usage: run over
Thayer's Greek Lexicon
ὑπερεκπερισσοῦ (Rec. ὑπέρ ἐκπερεκπερισσου and in Eph. ὑπέρ ἐκ περισσοῦ; see περισσός, 1), adverb (Vulg. (in Eph_3:20)superabundanter), superabundantly; beyond measure; exceedingly; 1Th_5:13 R G WH text; 1Th_3:10; (exceeding abundantly followed by ὑπέρ equivalent to) far more than, Eph_3:20 (Buttmann, § 132, 21). Not found elsewhere (except in Dan_3:22, Ald., Complutensian Cf. Buttmann, § 146, 4).
STRONGS NT 5240a: ὑπερεκπερισσῶςὑπερεκπερισσῶς, adverb, beyond measure: 1Th_5:13 L T Tr WH marginal reading (R. V. exceeding highly); see ἐκπερισσῶς. (Clement of Rome, 1 Cor. 20, 11 [ET].)
STRONGS NT 5240: ὑπερεκχύνωὑπερεκχύνω (ὑπερεκύννω, L T Tr WH; see ἐκχέω, at the beginning); to pour out beyond measure; passive, to overflow, run over, (Vulg.supereffluo): Luk_6:38 Joe_2:24 (Alex., etc.). (Not found elsewhere.)
Mounce Concise Greek Dictionary
ὑπερεκχύννω hyperekchunnō 1x
to pour out above measure or in excess; pass. to run over, overflow, Luk_6:38
Abbott-Smith Greek Lexicon
*† ὑπερ -εκ -χύννω ( Rec. -ύνω ), late form of -χέω ,
to pour out over. Pass ., to overflow, run over: Luk_6:38 (not elsewhere).†
Moulton & Milligan — Vocabulary of the Greek NT
ὑπερεκχύννω (~ ὑπερεκχύνω ) [page 653]
pour out to overflowing, pass, overflow, runover, occurs in Luk_6:38 , and as a v.l. in Joe_2:24 . According to Grimm-Thayer the word is not found elsewhere.
STEPBible — Tyndale Abridged Greek Lexicon
ὑπερ-εκ-χύννω (Rec. -ύνω), late form of -χέω
to pour out over. Pass., to overflow, run over: Luk.6:38 (not elsewhere).†
(AS)