1. Astronomy.
   1. An arbitrary formation of stars perceived as a figure or design, especially one of 88 recognized groups named after characters from classical mythology and various common animals and objects.
   2. An area of the celestial sphere occupied by one of the 88 recognized constellations.
2. The configuration of planets at the time of one's birth, regarded by astrologers as determining one's character or fate.
3. A gathering or an assemblage, especially of prominent persons or things: The symposium was attended by a constellation of artists and writers.
4. A set or configuration, as of related items, properties, ideas, or individuals: a constellation of demands ranging from better food to improved health care; a constellation of feelings about the divorce.

[Middle English constellacioun, from Old French constellation, from Late Latin cōnstellātiō, cōnstellātiōn- : Latin com-, com- + Latin stēlla, star.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.