noun
from long ago up to the present day
Archaic noun meaning 'from ancient times until now'. Rarely used in modern Japanese; the cross-referenced form 亘古 is more common.
See also: 亘古
「亙古」は古い文献で見られる表現で、遠い昔から現在に至るまでを指す。
「亙古」 is an expression found in old documents, referring to the span from ancient times to the present.