1 immersion (in sth) the act of putting sb/sth into a liquid so that he/she/it is completely covered; the state of being completely covered by a liquid 沉浸；浸没: Immersion in cold water resulted in rapid loss of heat. 浸入冷水就很快冷却。

2 immersion (in sth) the state of being completely involved in sth 陷入；专心: a two-week immersion course in French (= in which the student hears and uses only French) 两星期的法语强化课程