Heartfelt definition is - deeply felt : earnest. The card game hearts is so called from 1886. Heart: The muscle that pumps blood received from veins into arteries throughout the body. Meaning "inner part of anything" is from early 14c. See more. Anatomy a. by heart synonyms, by heart pronunciation, by heart translation, English dictionary definition of by heart. Define by heart. To have one's heart in … ; heart-shaped is from 1744. See also circulatory system, and see Plates. Her cheeks were hot and her heart was pounding. The heart serves as a pump controlling the blood flow in two circuits, the pulmonary and the systemic. Heart-wrenching definition, causing or involving great sadness or distress; heartbreaking: The accounts of their persecution are heart-wrenching. 1. 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. Heart disease definition, any condition of the heart that impairs its functioning. 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. Divisions of the Heart. How to use heart attack in a sentence. 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. How to use heartfelt in a sentence. 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. Heart attack attested from 1875; heart disease is from 1864. In reference to the conventional heart-shape in illustration, late 15c. A muscular viscus, which is the primary organ of the blood's motion in an animal body, situated in the thorax. Heart Attack (myocardial infarction): Permanent damage to the heart muscle caused by a lack of blood supply to the heart for an extended time period due to a blockage in a coronary artery. Can you hear my heart beating? 3 people chose this as the best definition of heart: The definition of heart i... See the dictionary meaning, pronunciation, and sentence examples. People also... | Meaning, pronunciation, translations and examples See more. heart [hahrt] the hollow muscular organ lying slightly to the left of the midline of the chest. KJV Dictionary Definition: heart heart. Synonym Discussion of heartfelt. n. 1. Heart definition: Your heart is the organ in your chest that pumps the blood around your body. The septum, a thick muscular wall, divides the heart into right and left halves. In an animal body, situated in the thorax definition: your heart is the organ in your that! `` inner part of anything '' is from early 14c heart attack attested 1875. 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