Definition of astronomize in English:

astronomize

(also astronomise)

verb

  • no object To pursue astronomy; to observe the night sky.

Origin

Late 17th century; earliest use found in Thomas Browne (1605–1682), physician and author. From astronomy + -ize. Compare French † astronomiser to practise astronomy.

Pronunciation

astronomize

/əˈstrɒnəmʌɪz/