The noun odor has 2 senses (first 2 from tagged texts)
1. (10) olfactory property, smell, aroma, odor, odour, scent -- (any property detected by the olfactory system)
2. (2) smell, odor, odour, olfactory sensation, olfactory perception -- (the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form; "she loved the smell of roses")