1 include, contain, comprise, cover, embrace, incorporate, encompass, take in, subsume, embody, comprehend, number among, count in:
The survey involved many people from all walks of life.
2 imply, entail, suggest, mean, betoken, require, necessitate, presuppose:
Enrolling for a course involves doing homework as well as attending classes
3 Often, involve in or with. implicate, concern, affect, touch, entangle, draw in; incriminate, inculpate; associate with, connect with, catch (up) in:
I didn't know that Annette was involved. Are you involved in that murder investigation?