Definition of hennas:
(n) :
(countable, uncountable) A reddish plant substance, prepared from the dried leaves of this plant, used for temporary tattoos and hair coloring. Hair colorings range from bright red to earth brown to near black.
(v) :
(transitive) To dye or tattoo with henna.
(n) :
(countable) A shrub, Lawsonia inermis, having fragrant reddish flowers.
(n) :
(countable, uncountable) A flower of this plant.
(n) :
(countable and uncountable) A rich reddish-brown colour.
(adj) :
Of a rich reddish-brown colour.