According to Osho, 'Buddha' is consciousness at its peak—awakening itself—not a person or concept. Because this state is beyond language, any verbal definition fails; hence Zen replies like Tozan’s 'three pounds of flax' shock the mind and point to immediate reality. Buddha must be tasted directly, here-now, rather than explained or believed.
Buddha means being fully awake inside, something you feel directly, so teachers point to simple, present things to help you notice it now.