Wrong definition
Definition Heart - Merriam Webster
Full Definition of HEART
1
a : a hollow muscular organ of vertebrate animals that by its rhythmic contraction acts as a force pump maintaining the circulation of the blood
b : a structure in an invertebrate animal functionally analogous to the vertebrate heart
c : breast, bosom
d : something resembling a heart in shape; specifically : a stylized representation of a heart
2
a : a playing card marked with a stylized figure of a red heart
b plural : the suit comprising cards marked with hearts
c plural but sing or plural in constr : a game in which the object is to avoid taking tricks containing hearts
3
a : personality, disposition <a cold heart>
b obsolete : intellect
4
: the emotional or moral as distinguished from the intellectual nature: as
a : generous disposition : compassion <a leader with heart>
b : love, affection <won her heart>
c : courage, ardor <never lost heart>
5
: one's innermost character, feelings, or inclinations <knew it in his heart> <a man after my own heart>
6
a : the central or innermost part : center
b : the essential or most vital part of something
c : the younger central compact part of a leafy rosette (as a head of lettuce)
— at heart : in essence : basically, essentially
— by heart : by rote or from memory
— to heart : with deep concern
I do not get my doctrine from the english dictionarey either.
καρδία, -ας, ἡ, poetic κραδία and καρδίη (in the latter form almost always in Hom. [only at the beginning of a line in three places; everywhere else by metathesis κραδίη; Ebeling, Lex. Hom. s. v.]), [fr. a root signifying to quiver or palpitate; cf. Curtius § 39; Vaniček p. 1097 (Etym. Magn. 491, 56 παρὰ τὸ κραδαίνω, τὸ σείω• ἀεικίνητος γὰρ ἡ καρδία); allied with Lat. cor; Eng. heart]; Sept. for לֵב and לֵבָב; the heart;
1. prop. that organ in the animal body which is the centre of the circulation of the blood, and hence was regarded as the seat of physical life: 2 S. 18:14; 2 K. 9:24; Tob. 6:5 (4), 7 (6) sq., 17 (16). Hence
2. univ. καρδία denotes the seat and centre of all physical and spiritual life; and
a. the vigor and sense of physical life (Ps. 101 (102):5; στήρισον τὴν καρδίαν σου ψωμῷ ἄρτου, Judg. 19:5; to which add Ps. 103 (104):15): τρέφειν τὰς καρδίας, Jas. 5:5; ἐμπιπλῶν τὰς καρδίας τροφῆς, Acts 14:17; Βαρεῖν τ. καρδίας κραιπάλῃ καὶ μέθῃ, Lk. 21:34; [but see b. δ. below];
b. the
centre and seat of spiritual life, the soul or mind, as it is the fountain and seat of the thoughts, passions, desires, appetites, affections, purposes, endeavors [so in Eng. heart, inner man, etc.];
Thayer, J. H. (1889). A Greek-English lexicon of the New Testament: being Grimm’s Wilke's Clavis Novi Testamenti (p. 325). New York: Harper & Brothers.
2840 καρδία (kardia), ας (as), ἡ (hē): n.fem.; ≡ DBLHebr 4213, 4222; Str 2588; TDNT 3.605—1. LN 26.3
inner self, never the literal body part called the “heart,”
this is a reference to the areas of the inner self, including: the volition, the mind, the desires, etc., though the facility of the intellect make be slightly more emphasized (Mt 15:19; Lk 6:45 v.r.); 2. LN 83.14 inside, far inside something (Mt 12:40), note: see LN index for a fuller treatment of the lexical units.
Swanson, J. (1997). Dictionary of Biblical Languages with Semantic Domains: Greek (New Testament) (electronic ed.). Oak Harbor: Logos Research Systems, Inc.