Maya (n.) is the world of appearances, sharing its Sanskrit root with mother, matter and meter: mā-, "to measure" — the world-as-measured.
Maya (n.) is illusory in a bad sense only when the measuring mind's divided world stops serving the undivided one — when we can't see the forest for the trees.
Maya (n.) is not the world vanishing into a luminous ocean; Brahman is not One against Many, so it cannot be set against the world either.
Maya (n.) is classification itself — from the root "to measure," which also gave us meter, matrix, material and matter.
Maya (n.) means not just illusion but the entire world-picture of a culture, seen as illusion in the strict sense of play — from the Latin ludere.
Maya (n.) is the illusion the Eastern ways set us free from, and it is made of social institutions — language, logic and their constructs — not of the physical world.
Maya (n.) means illusion — from ludere, to play — but also magic, creative power, art, and measuring, as when one dances to a measure.
Maya (n.) is the world of forms, profoundly lacking in seriousness when seen from the standpoint of reality.