I don't know what dictionary you are reading. This is what mine says. ex·pert (kspûrt) n. 1. A person with a high degree of skill in or knowledge of a certain subject. 2. a. The highest grade that can be achieved in marksmanship. b. A person who has achieved this grade. adj. (kspûrt, k-spûrt) Having, involving, or demonstrating great skill, dexterity, or knowledge as the result of experience or training. See Synonyms at proficient.