Definition of hemp
1 a
: a tall widely cultivated Asian herb (Cannabis sativa of the family Cannabaceae, the hemp family) that has a tough bast fiber used especially for cordage and that is often separated into a tall loosely branched species (C. sativa) and a low-growing densely branched species (C. indica)
b
: the fiber of hemp
c
: a psychoactive drug (such as marijuana or hashish) from hemp
2
: a fiber (such as jute) from a plant other than the true hemp;
also
: a plant yielding such fiber
