Meaning

noun the ability to comprehend; to understand and profit from experience

noun a unit responsible for gathering and interpreting information about an enemy

noun secret information about an enemy (or potential enemy)

originFrom Middle English intelligence, from Old French intelligence, from Latin intelligentia, which is from inter- (“between”) + legere (“to choose, pick out, read”), from Proto-Italic *legō (“to care”). Doublet of intelligentsia.

Etymology from Wiktionary, CC BY-SA 3.0