n. The principal organ of the circulation of the blood in man and other animals; the physiological center of the blood-vascular system.n. The human heart or breast considered as the seat of all or of some of the mental faculties; hence, in common figurative use, these faculties themselves.n. The intellectual faculties; especially, inmost or most private thought; innermost opinions or convictions; genuine or intense desire or sentiment: as, she despised him in her heart; the heart of a man is unsearchable; the devices of the heart; to set one's heart upon something.n. Good feeling; love; kindness; sensibility: as, she is all heart; he is all head and no heart; to gain one's heart; to give the heart to God.n. Courage; spirit; determination; firmness of will; capacity for perseverance or endurance: as, to take heart; his heart failed him.n. The breast, as covering the heart, considered as the seat of affection.n. The inner part of anything; the middle or center: as, the heart of a country or a town.n. The chief, vital, or most essential part; the vigorous or efficacious part; the core.n. A person, especially a brave or affectionate person: used as a term of encouragement, praise, or endearment.n. Strength; power of producing; vigor; fertility: as, to keep the land in heart.n. Something that has the shape or form of a heart; especially, a roundish or an oval figure or object having an obtuse point at one end and a corresponding indentation or depression at the other, regarded as representing the figure of a heart; especially, such a figure on a playing-card.n. One of a suit of playing-cards marked with such a figure.n. plural A game of cards played with the full pack by four persons.n. Nautical, a block of hard wood in the shape of a heart for the lanyards of stays to reeve through.n. In botany, the core of a tree; the solid central part without sap or albumen. See heart-wood.To give heart to; encourage; hearten.In masonry, to build, as the interior of a rubble wall, solidly with stone and mortar.To form a close, compact head, as a plant; especially, to have the central part of the head close and compact: as, some varieties of cabbage heart well.n. An excessive deposit of fat around the heart.