1 a : the ability to learn or understand or to deal with new or trying situations : reason. b : the ability to apply knowledge to manipulate one’s environment or to think abstractly c : mental acuteness : shrewdness.
2: an intelligent entity; especially : cosmic intelligence.
3: the act of understanding : comprehension.
4 a : information, news b : information concerning an enemy or possible enemy or an area; also : an agency engaged in obtaining such information.
(Etymology: Middle English, from Middle French, from Latin intelligentia, from intelligent-, intelligens intelligent. From inter- “between” + legere “choose, pick out, read. Date: late 14th century.
) – Webster’s.