noun

1. 1. that characteristic of a substance which makes it perceptible to the sense of smell
   2. a smell, whether pleasant or unpleasant; fragrance, stench, etc.
2. a pervasive atmosphere or quality an odor of intolerance
3. Archaic a perfume or other sweet-smelling substance

Etymology: OFr < L < IE base *od-, to smell, odor > Gr odmē, (var. of osmē), scent, Swed os, smell, suffocating gas