An excessive, or unusually great involvement.

What is the plural of involvement?

involvement (usually uncountable, plural involvements) The act of involving, or the state of being involved.

What does overly involved mean?

characterizing a person who relies too much on academic learning or who is overly concerned with minor details, rules or formalisms. Ex: Our company doesn't like to deal with this work supervisor because they say he's too draconian and quite pedantic.