immemorial
adjective(im-me-mo-ri-al)
extending or existing since beyond the reach of memory, record, or tradition
immemorial
noun(im-me-mo-ri-al)
time so long past as to be indefinite in history or tradition —called also time out of mind
immemorial
noun(im-me-mo-ri-al)
a time antedating a period legally fixed as the basis for a custom or right
immemorial
idiom(im-me-mo-ri-al)
for a very long time