大毘盧遮那成佛經疏 1.4

1.4

As for "abhisaṃbodhi" (becoming a Buddha): fully expressed in Sanskrit, it should be attaining saṃbodhi, which means correct awakening and correct knowledge. That is to say, by means of knowledge of reality, knowing past, future, and present, whether included among sentient beings or not included among sentient beings, permanent or impermanent—all such dharmas are clearly and completely awakened to and known; hence it is called awakening. And since the Buddha is precisely the awakened one, for the sake of brevity the text merely says "becoming a Buddha".