Keywords: file
Sign Definition
As a Noun
1. A group of people walking along one behind the other. English = file.
As a Verb or Adjective
1. Of people, to walk one behind another into a place. English = file, file in; (be) in single file.
2. Of a group of people, to enter a building or room all at once, usually after having waited for some time; to go en masse.