Definition - being girded (“encircled with a band, such as a belt”)
Succinct is not one of the words most in use today, but it does come up from time to time; when encountered it typically has the meaning of “marked by compact precise expression without wasted words.” When it first came into English, in the 15th century, it was with the “girded” meaning. Although this meaning is now quite obsolete, it is not surprising that it was the first one attached to succinct, which may be traced to the Latin cingere (“to gird”), which has also served as the root of cinch and discinct (“loosely dressed”).
In curles on either cheek plaid, wings he wore
Of many a colourd plume sprinkl'd with Gold,
His habit fit for speed succinct, and held
Before his decent steps a Silver wand.
— John Milton, Paradise Lost, 1674