In the dictionary look up the word Maya as he uses it.

Maya or Māyā (Sanskrit माया māyāa[›]), in Indian religions, has multiple meanings, usually quoted as "illusion", centered on the fact that we do not experience the environment itself but rather a projection of it, created by us. Māyā is the principal deity that manifests, perpetuates and governs the illusion and dream of duality in the phenomenal Universe