1) Odor emission unit 2) Patron saint of norway 3) Unit of measurement 
[unit] The olf is a unit used to measure the strength of a pollution source. It was introduced by Danish professor P. Ole Fanger; the name `olf` is derived from the Latin word olfactus, meaning `smelled`. One olf is the sensory pollution strength from a standard person defined as an average adult working in an office or similar non-industri...
unit used to measure scent emission of people and objects; one olf is defined as the scent emission of an “average person�, a sitting adult that takes an average of 0.7 baths per day and whose skin has a total area of 1.8 m2; the scent emission of an object or person is measured by specially trained personnel comparing it to normed scent...
• (n.) The European bullfinch.
abbreviation: Outlying Field
Olf noun [ Etymol. uncertain.] (Zoology) The European bullfinch. [ Prov.Eng.]