Definition of blackstrap
1
: a common red wine of the Mediterranean
2
: a drink consisting of a mixture of rum and molasses
3
or
blackstrap molasses
a
: the final molasses that is obtained in the last of successive processes of raw sugar manufacture and used as a constituent of many mixed cattle feeds and as a raw material for the production of industrial alcohol
b
: any thick and very dark molasses
4
: a dark heavy oil used especially for lubricating mine-car wheels
