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matter of the heart definition, matter of the heart meaning | English dictionary. matter. 2 substance that occupies space and has mass, as distinguished from substance that is mental, spiritual, etc. n the substance or main theme of a book, discussion, debate, etc.
3. murmur-an abnormal sound of the heart; sometimes a sign of abnormal function of the heart valves. cardiac murmur, heart murmur. symptom - (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease. systolic murmur-a murmur heard during systole.