Involvement definition

(1) The act of sharing in the activities of a group

"The teacher tried to increase his students' engagement in class activities"

(2) A sense of concern with and curiosity about someone or something

"An interest in music"

(3) A connection of inclusion or containment

"He escaped involvement in the accident"

"There was additional involvement of the liver and spleen"

(4) The condition of sharing in common with others (as fellows or partners etc.)

(5) A usually secretive or illicit sexual relationship