or as·tro·nom·ic

[as-truh-nom-i-kuh l or as-truh-nom-ik]


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

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 astronomic

Historical Examples of astronomic

  • The astronomic relationship between the two is very evident.

  • And he wished his faculties to work with astronomic punctuality.

    Robert Orange

    John Oliver Hobbes

  • His great circles and spirals have a kind of astronomic completeness.

    Under the Maples

    John Burroughs

  • Emerson speaks of Swedenborg's faculties working with astronomic punctuality, and this would apply to Purcell's musical faculties.


    John F. Runciman

  • Suffice it to quote a few “astronomic” figures in order to gauge the insuperable obstacles in the way of a reasonable Budget.

    The Russian Turmoil

    Anton Ivanovich Denikin

British Dictionary definitions for astronomic




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 astronomic



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