Definify.com

Webster 1913 Edition

Adj.

See

achronic ‎(comparative more achronic, superlative most achronic)

Timeless.
- 2002, Colin Jones, The Great Nation, Penguin 2003, page 522:
  Enlightenment quarrels between pro-Frankish and pro-Gaulish factions were now a political curio, and only ancient Rome and Greece – so far removed in time and space that they seemed both utopian and achronic – provided any sort of positive historical referent.
(astronomy) Happening at sunset (of the rise or fall of a star; opposed to cosmic).