Definitions for "Universal grammar"
the principles forming the basis for the human ability to understand language.
the general properties and constraints common to all human languages; also, the study of such principles.
(UG) the theory, suggested by the American linguist Noam Chomsky, that all children possess an in-built faculty for spoken language, a theory which is disputed by others, who consider that children are born only with general learning processes which enable them to learn language amongst other things.