Quick Definition
πώρωσις, εως, ἡ n.f. hardness of heart
Strong's Definition
from 4456; stupidity or callousness
KJV Usage: blindness, hardness
UBS Dictionary of the Greek New Testament
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
πώρωσις, -ews, 7, (πωρόω, q- V-), prop. the covering with a callus; trop. obtuseness of mental discernment, dulled perception: γέγονέ τινι, the mind of one has been blunted [R. V. a hardening hath befallen}, Ro. xi. 25; τῆς καρδίας jhardening of heart], of stubbornness, obduracy, Mk. iii. 5; Eph. iv 18. ‘(Hippocr.)]* TOS
Mounce Concise Greek Dictionary
πώρωσις pōrōsis 3x
a hardening; met. hardness of heart, callousness, insensibility, Mk. 3:5; Rom. 11:25; Eph. 4:18*
Abbott-Smith Greek Lexicon
* πώρωσις, -εως, ἡ
(< πωρόω),
a covering with a callus, a hardening: metaph., Mk 3:6, Ro 11:25, Eph 4:18.†
Moulton & Milligan — Vocabulary of the Greek NT
πώρωσις. For a full discussion of this word and its cognates, see Armitage Robinson Z/hesians, p. 264 ff., where it is shown that in the NT ‘‘obtuseness or intellectual blindness is the meaning indicated by the context ’’; and that ‘this meaning is as a rule assigned by the ancient translators and commentators” (p. 273).
Liddell-Scott-Jones — Greek-English Lexicon
πώρωσις (pōrōsis) — hardening. πώρ-ωσις, εως, ἡ, process by which the extremities of fractured bones are reunited by a callus, [Refs 5th c.BC+]
II. metaphorically, obtuseness, blindness, τῆς καρδίας [NT]