1. 何かに夢中になった精神状態(the mental state of being preoccupied by something)
2. 完全な注視(complete attention)
3. ある物質が他に透過する過程(a process in which one substance permeates another)
4. 放射されたエネルギーが反射や透過をせずに保たれている物理的作用(the process in which incident radiated energy is retained without reflection or transmission on passing through a medium)