When something engrosses our mind, we become fully absorbed and captivated by it. Synonyms for this phrase include "consume the thoughts," "occupy the attention," "preoccupy the mind," "hold the interest," and "fascinate the intellect." To engross the mind can also mean to immerse oneself in a particular activity or topic, as in "drown oneself in research" or "plunge into a good book." Other synonyms for engrossing the mind might include "obsessing over," "mesmerizing," or "intensely focusing on." Whenever something captures our attention and draws us in completely, we can say that it engrosses our mind.