Also found in: Dictionary, Thesaurus, Legal, Wikipedia.
Related to immemorial: since time immemorial
Long before one would be able to remember; the distant past. Our family line has presided over this land since time immemorial. Giant sea turtles have been coming to this spot to mate since time immemorial.
since time immemorial
since a very long time ago. (Literally, since time before recorded history.) My hometown has had a big parade on the Fourth of July since time immemorial. since time immemorial, the trees have blossomed each spring.
from/since time immemorial(literary)
for longer than anyone can remember Her family had farmed that land from time immemorial.
Also, time out of mind. Long ago, beyond memory or recall, as in These ruins have stood here since time immemorial, or His office has been on Madison Avenue for time out of mind. The first expression comes from English law, where it signifies "beyond legal memory," specifically before the reign of Richard I (1189-1199), fixed as the legal limit for bringing certain kinds of lawsuit. By about 1600 it was broadened to its present sense of "a very long time ago." The variant, first recorded in 1432, uses mind in the sense of "memory" or "recall."