guard's van

:  one assigned to protect or oversee another: such as

:  a person or a body of persons on sentinel duty

:  troops attached to the person of the sovereign

:  to protect an edge of with an ornamental border

:  to protect from danger especially by watchful attention :  make secure

:  to stand at the entrance of as if on guard or as a barrier

:  a usually enclosed wagon or motortruck used for transportation of goods or animals

:  caravan

:  a multipurpose enclosed motor vehicle having a boxlike shape, rear or side doors, and side panels often with windows

:  to transport by van

:  vanguard

:  a winnowing device (such as a fan)

:  wing