Merriam-Webster Collegiate Dictionary - gang

 I. intransitive verb  Etymology: Middle English, from Old English ~an; akin to Lithuanian zengti to stride  Date: before 12th century Scottish go  II. noun  Etymology: Middle English, walking, journey, from Old English; akin to Old English ~an  Date: 15th century  1.  a.  (1) a set of articles ; outfit a ~ of oars  (2) a combination of similar implements or devices arranged for convenience to act together a ~ of saws  b. group: as  (1) a group of persons working together  (2) a group of persons working to unlawful or antisocial ends; especially a band of antisocial adolescents  2. a group of persons having informal and usually close social relations watching TV with the ~  III. verb  Date: 1856  transitive verb  1.  a. to assemble or operate simultaneously as a group  b. to arrange in or produce as a ~  2. to attack in a ~  intransitive verb to move or act as a ~