vial /ˈvaɪəl/noun 1verb 1forms 5 noun1 •A glass or plastic vessel or bottle, especially a small tube-shaped bottle used to store medicine, perfume or other chemicals.Take thou this vial, being then in bed, / And this distilled liquor drink thou off. — 1591 verb1 •To keep or put (something, especially a liquid) in, or as if in, a vial (noun sense). formsvialed · vialled · vialing · vialling · vials