or as·tro·nom·ic

[ as-truh-nom-i-kuh l or as-truh-nom-ik ]
/ ˌæs trəˈnɒm ɪ kəl or ˌæs trəˈnɒm ɪk /


of, relating to, or connected with astronomy.
extremely large; exceedingly great; enormous: It takes an astronomical amount of money to build a car factory.

Nearby words

  1. astronautical engineering,
  2. astronautics,
  3. astronavigation,
  4. astronomer,
  5. astronomer royal,
  6. astronomical clock,
  7. astronomical distance,
  8. astronomical frame of reference,
  9. astronomical refraction,
  10. astronomical telescope

Origin of astronomical

1550–60; < Latin astronomic(us) (< Greek astronomikós; see astronomy, -ic) + -al1

Related formsas·tro·nom·i·cal·ly, adverbnon·as·tro·nom·ic, adjectivenon·as·tro·nom·i·cal, adjectivenon·as·tro·nom·i·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for astronomical

British Dictionary definitions for astronomical



/ (ˌæstrəˈnɒmɪkəl) /


enormously large; immense
of or relating to astronomy
Derived Formsastronomically, adverb

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for astronomical



1550s, from astronomy + -ical. Popular meaning "immense, concerning very large figures" (as sizes and distances in astronomy) is attested from 1899. Astronomical unit (abbreviation A.U.) "mean distance from Earth to Sun," used as a unit of measure of distance in space, is from 1909. Related: Astronomically.

Online Etymology Dictionary, © 2010 Douglas Harper