Meaning of stellar association

stel'lar associa'tion

Pronunciation: [key]
— Astron. Astron.
  1. a sparsely populated group of between 10 and 1000 young stars of similar spectral type and common origin that are moving too fast to form a permanent, gravitationally bound system.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.