资料来源 : Webster's Revised Unabridged Dictionary (1913)

Double-breasted \Dou"ble-breast`ed\, a.
   Folding or lapping over on the breast, with a row of buttons
   and buttonholes on each side; as, a double-breasted coat.

资料来源 : WordNet®

double-breasted
     adj : (of clothing) fastened by lapping one edge of the front well
           over the other usually with a double row of buttons;
           "double-breasted jacket"; "double-breasted suit" [ant:
           {single-breasted}]