What is "immemorially"

Usage examples of "immemorially".

In this persuasion certain of the Aztec priests practised complete abscission or entire discerption of the virile parts, and a mutilation of females was not unknown similar to that immemorially a custom in Egypt.

It is not we only, you and I, who look into the still waters of the wilderness and lonely places, and are often dimly perplext, are often troubled we know not how or why: some forgotten reminiscence in us is aroused, some memory, not our own, but yet our heritage is perturbed, footsteps that have immemorially sunk in ancient dusk move furtively along obscure corridors in our brain, the ancestral hunter or fisher awakes, the primitive hillman or woodlander communicates again with old forgotten intimacies and the secret oracular things of lost wisdoms.