Meaning

adjective relating to or concerned with strategy

adjective highly important to or an integral part of a strategy or plan of action especially in war

originFrom Ancient Greek στρατηγικός (stratēgikós, “of or for a general", also "a treatise on strategy”), from στρατηγός (stratēgós, “the leader or commander of an army, a general”), from στρατός (stratós, “army”) + ἄγω (ágō, “I lead, I conduct”).

Etymology from Wiktionary, CC BY-SA 3.0