To begin to seem unimportant when compared to something else. My good grades faded into insignificance once my sister got home with news that she would be the lead in the school play.

To diminish or lessen in significance, importance, impact, or value, especially over time or compared to something else. The horrible tensions and violence that used to grip this city have started to pale into insignificance as we continue this period of peace and prosperity. I've found a bit of success with my work, but it pales into insignificance compared to the works of the writers who inspired me.