- The definition of a vial is a small sized bottle that usually holds liquids.
An example of a vial is a container for holding a liquid chemical in a lab.
Vials of different colored liquids.
vial definition by Webster's New World
Origin: Middle English viole, variant, variety of fiole ; from Old French ; from Old ProvenÃ§al fiola: see phial
vial definition by American Heritage Dictionary
Origin: Middle English viole, variant of fiol; see phial.