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
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