Immemorial/ˌɪməˈmɔːriəl/ Definition 1 of 2Pro Tip 1/3Beyond Memory Immemorial refers to a time so old that people can't remember it. These rituals date back to time immemorial. Pro Tip 2/3History's Start Use 'immemorial' when discussing events that occurred before recorded history. Legends of these lands stretch into the immemorial past. Pro Tip 3/3Cultural Depth Highlight the cultural significance of traditions without a clear origin. This festival has immemorial roots in the village.