immersion in WordNet English dictionary

1. complete attention; intense mental effort
   concentration  engrossment  absorption  immersion 
   
2. the act of wetting something by submerging it
   submersion  immersion  ducking  dousing 
   
3. a form of baptism in which part or all of a person's body is submerged
   immersion 
   
4. sinking until covered completely with water
   submergence  submerging  submersion  immersion 
   
5. (astronomy) the disappearance of a celestial body prior to an eclipse
   ingress  immersion