A noun "tincture" represents a color or tint, a slight addition or trace of something, and a hue or pattern used in heraldry.
A medicine dissolved in ethanol or another solvent, or a small alcoholic drink.
(transitive) Color or stain something with a dye or pigment, add a slight amount of an abstract or physical quality to something, or dissolve a substance in a solvent to produce a medicinal tincture.
(intransitive, rare) To have a taint or tinge of some quality.