A perfume is an odor or more often a more or less persistent odorous composition naturally emitted by a plant, an animal, a mushroom, or an environment. In nature, perfumes are often chemical and biochemical messages, including pheromones or phytohormones.

It can also be the emanation of a natural substance (a flower extract for example) or created or recreated from different aromas, solvents and fixatives intended for cosmetic use or to perfume objects, animals or indoor air. It is then generally made from vegetable essences and/or synthetic molecules. The use of perfumes by the Man is very old, going back to the highest Antiquity.