Heart-wrenching definition, causing or involving great sadness or distress; heartbreaking: The accounts of their persecution are heart-wrenching. The card game hearts is so called from 1886. Her cheeks were hot and her heart was pounding. heart [hahrt] the hollow muscular organ lying slightly to the left of the midline of the chest. Divisions of the Heart. KJV Dictionary Definition: heart heart. Heart attack attested from 1875; heart disease is from 1864. 3 people chose this as the best definition of heart: The definition of heart i... See the dictionary meaning, pronunciation, and sentence examples. ; heart-shaped is from 1744. From Longman Dictionary of Contemporary English Related topics: Biology, Shapes, patterns, Plants, Food, Human heart heart 1 / hɑːt $ hɑːrt / S1 W1 noun 1 body organ [countable] HB BODY the organ in your chest which pumps blood through your body Regular exercise is good for the heart. Meaning "inner part of anything" is from early 14c. Heart: The muscle that pumps blood received from veins into arteries throughout the body. 1. See more. Heart attack definition is - an acute episode of coronary heart disease marked by the death or damage of heart muscle due to insufficient blood supply to the heart usually as a result of a coronary artery becoming blocked by a blood clot formed in response to a ruptured or torn fatty arterial deposit —called also myocardial infarction. To have one's heart in … The septum, a thick muscular wall, divides the heart into right and left halves. The heart is positioned in the chest behind the sternum (breastbone); in front of the trachea, esophagus, and aorta; and above the diaphragm.A normal heart is about the size of a closed fist and weighs about 298 grams or 10.5 ounces. See also circulatory system, and see Plates. Can you hear my heart beating? A muscular viscus, which is the primary organ of the blood's motion in an animal body, situated in the thorax. Define by heart. See more. Anatomy a. Heart disease definition, any condition of the heart that impairs its functioning. n. 1. Heart disease definition is - an abnormal condition of the heart or of the heart and circulation (such as coronary heart disease, arrhythmia, or heart-valve defect). HEART, n. L. cor, cordis, and allied to Eng.core, or named from motion, pulsation. Heartfelt definition is - deeply felt : earnest. How to use heart attack in a sentence. How to use heartfelt in a sentence. by heart synonyms, by heart pronunciation, by heart translation, English dictionary definition of by heart. Synonym Discussion of heartfelt. The heart serves as a pump controlling the blood flow in two circuits, the pulmonary and the systemic. Heart definition: Your heart is the organ in your chest that pumps the blood around your body. People also... | Meaning, pronunciation, translations and examples In reference to the conventional heart-shape in illustration, late 15c. 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