1 tr. rub or wipe out (a mark etc.).
2 tr. (in abstract senses) obliterate; wipe out (effaced it from his memory).
3 tr. utterly surpass; eclipse (success has effaced all previous attempts).
4 refl. treat or regard oneself as unimportant (self-effacing).
Derivatives:
effacement n.
Etymology: F effacer (as EX-(1), FACE)
Useful english dictionary. 2012.