integration

Concise Oxford English Dictionary © 2008 Oxford University Press:
integration/ɪntɪˈɡreɪʃn/

▶noun

• 1 the action or process of integrating.

• 2 Mathematics the finding of an integral or integrals.

• 3 Psychology the coordination of processes in the nervous system.

• 4 Psychoanalysis the process by which a well-balanced psyche becomes whole as the developing ego organizes the id.

– derivatives
integrationist noun.