Of a garment or part of a garment: capacious, ample; large and loose. Cf. wide coat n. at compounds 2. Obsolete, except as merged with sense 5.

With dress or part of dress unfastened or loosened.

Of clothes: Loose-fitting, worn loosely. Of persons: Negligent in attire and deportment. Of handwriting: Not compact; also, careless, not precise…

(un-, prefix1 affix 2.)

Of dress: Loose, slack, ill-fitting.

Of a garment: Hanging more or less loosely from the shoulders; not fitted to the waist.