involvement

noun

1. 1

   the act of sharing in the activities of a group

   the teacher tried to increase his students' engagement in class activities

2. 2

   a sense of concern with and curiosity about someone or something

   an interest in music

3. 3

   a connection of inclusion or containment

   he escaped involvement in the accident

   there was additional involvement of the liver and spleen

4. 4

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

5. 5

   a usually secretive or illicit sexual relationship