Definition of cannabis
1
: a tall Asian herb (Cannabis sativa of the family Cannabaceae, the hemp family) that has a tough fiber and is often separated into a tall loosely branched species (C. sativa) and a low-growing densely branched species (C. indica) : hemp sense 1a
—used especially for cultivated varieties having high levels of THC
2a
: the psychoactive dried flower buds, leaves, or preparations (such as hashish) or chemicals (such as THC) that are derived from the cannabis plant
especially
: marijuana
b
: cannabinoid
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Merriam-Webster unabridged
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Time Traveler for cannabis
The first known use of cannabis was in 1783
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