Definition of Curriculum by Hilda Taba and Tyler

Hilda Taba(1962) defines a curriculum as containing a statement of the aims and of the specific objectives; it indicates some selection and organization of content; it either implies or manifest certain patterns of learning and teaching. It includes a program of evaluation of the outcomes.
Ralph Tyler(1957): the curriculum is all of the learning of students which is planned by and directed by the school to attain its educational goals.