2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Comet \Com"et\, n. [L. cometes cometa, from Gr ? comet, prop.
long-haired, fr ? to wear long hair, fr ? hair, akin to L.
coma: cf F. com[`e]te.] (Astron.)
A member of the solar system which usually moves in an
elongated orbit, approaching very near to the sun in its
perihelion, and receding to a very great distance from it at
its aphelion. A comet commonly consists of three parts: the
nucleus, the envelope, or coma, and the tail; but one or more
of these parts is frequently wanting. See Illustration in
Appendix.
From WordNet r 1.6 [wn]:
comet
n : (astronomy) a relatively small celestial body consisting of
a frozen mass that travels around the sun in a highly
elliptical orbit
more about comet
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