1 the process of a liquid, gas or other substance being taken in （液体、气体等的）吸收（过程）: Vitamin D is necessary to aid the absorption of calcium from food. 为了帮助吸收食物中的钙，需要服用维生素 D。

2 the process of a smaller group, country, etc, becoming part of a larger group or country （大组织或国家对小组织、国家等的）同化，吸收；并入: the absorption of immigrants into the host country 移民被所在国同化

3 absorption (in sth) the fact of sb being very interested in sth so that it takes all his/her attention 专心；全神贯注: His work suffered because of his total absorption in sport. 他对体育着了迷，因此工作受影响。