Sharing the activities of a group

• Inclusion; entanglement
• A sense of concern with and curiosity about someone or something
• A connection of inclusion or containment
• A usually secretive or illicit sexual relationship

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun COLLOCATIONS FROM OTHER ENTRIES active participation/involvement (= in an activity or event ) ▪ Active participation in community life is important in small towns and villages. ▪ The school encourages the active involvement of parents. deny any involvement ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Involvement \In*volve"ment\, n. The act of involving, or the state of being involved. --Lew Wallace.

Wikipedia Word definitions in Wikipedia