Pronunciation: (ôl'mu-nak"), [key]
1. an annual publication containing a calendar for the coming year, the times of such events and phenomena as anniversaries, sunrises and sunsets, phases of the moon, tides, etc., and other statistical information and related topics.
2. a publication containing astronomical or meteorological information, usually including future positions of celestial objects, star magnitudes, and culmination dates of constellations.
3. an annual reference book of useful and interesting facts relating to countries of the world, sports, entertainment, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.