53 minutes ago · The astronomical system of units, formerly called the IAU (1976) System of Astronomical Constants, is a system of measurement developed for use in astronomy. It was …

The meaning of ASTRONOMICAL is of or relating to astronomy. How to use astronomical in a sentence.

ASTRONOMICAL definition: 1. connected with astronomy: 2. An astronomical amount is extremely large: 3. connected with…. Learn more.

ASTRONOMICAL definition: of, relating to, or connected with astronomy. See examples of astronomical used in a sentence.

Jan 20, 2026 · Adjective astronomical (comparative more astronomical, superlative most astronomical) (not comparable, astronomy) Of or relating to astronomy.

1. Of or relating to astronomy. 2. Of enormous magnitude; immense: an astronomical increase in the deficit.

If you describe an amount, especially the cost of something as astronomical, you are emphasizing that it is very large indeed.

Astronomical refers to anything related to astronomy, the scientific study of celestial objects, space, and the physical universe. The term can describe the vast size, quantity, scale or phenomena observed …

Astronomical definition: Of or relating to astronomy.

There are four meanings listed in OED's entry for the word astronomical, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.