  A consistent definition of high dimensional compactified quantum field theory
without breaking the Kaluza-Klein tower is proposed. It is possible in the
limit when the size of compact dimensions is of the order of the cut off. This
limit is nontrivial and depends on the geometry of compact dimensions. Possible
consequences are discussed for the scalar model.

High Energy Physics - Theory;General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology