v.tr. 1 (often foll. by in) cause (a person or thing) to participate, or share the experience or effect (in a situation, activity, etc.). 2 imply, entail, make necessary. 3 (foll. by in) implicate (a person in a charge, crime, etc.). 4 include or affect in its operations. 5 (as involved adj.) a (often foll. by in) concerned or interested. b complicated in thought or form.
[ ME f. L involvere involut- (as IN-(2), volvere roll) ]