/hav"euhr sak'/ , n.
1. a single-strapped bag worn over one shoulder and used for carrying supplies.
2. a soldier's bag for rations, extra clothing, etc.
[ 1740-50; earlier havresack havresac Habersack, equiv. to Haber oats (cf. dial. E haver hafrar oats) + Sack SACK 1 ]