1 ~ (to sth) being an essential part of sth:
Music is an integral part of the school's curriculum. * Practical experience is integral to the course.
2 [usuallybeforenoun] included as part of sth, rather than supplied separately:
All models have an integral CD player.
3 [usuallybeforenoun] having all the parts that are necessary for sth to be complete:
an integral system
integrally adverb
