What does aam mean?
The definition of aam
Aam, n.
Etym: [D. aam, fr. LL. ama; cf. L. hama a water bucket, Gr.

A Dutch and German measure of liquids, varying in different cities, being at Amsterdam about 41 wine gallons, at Antwerp 36½, at Hamburg 38¼. [Written also Aum and Awm.]