Meaning of quantum field theory

quan'tum field' the"ory

Pronunciation: [key]
— Physics. Physics.
  1. any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.