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| a chattering or flighty, light-headed person. |
| the offspring of a zebra and a donkey. |
heart (härt)
n.
The chambered, muscular organ in vertebrates that pumps blood received from the veins into the arteries, thereby maintaining the flow of blood through the entire circulatory system.
A similarly functioning structure in invertebrates.
heart (härt) Pronunciation Key
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The hollow muscular organ that is the center of the circulatory system. The heart pumps blood throughout the intricate system of blood vessels in the body.
heart definition
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hearts
card game in which players aim to avoid taking tricks that contain hearts. Hearts first appeared in the United States about 1880, although it derives from the much older European game of reverse. In the late 20th century a version of hearts was included with every personal computer running the Windows operating system. This version of hearts became standard with the spread of computers and, later, computer software for playing hearts over the Internet.
Learn more about hearts with a free trial on Britannica.com.