Immersion
Part of speech: noun
Definition: the act of immersing or the condition of being immersed the total submerging of a person in water as an act of baptism an immersion heater a smooth map whose differential is everywhere injective, related to the mathematical concept of an embedding
Engrossment
Part of speech: noun
Definition: The state of being engrossed; concentration or preoccupation.The fact or instance of writing in a legal document.