/ ɪˈmʌlʃn; NAmE / noun [ C , U ]
any mixture of liquids that do not normally mix together, such as oil and water
(also eˈmulsion paint ) ( BrE ) a type of paint used on walls and ceilings that dries without leaving a shiny surface
( technical ) a substance on the surface of photographic film that makes it sensitive to light
early 17th cent. (denoting a milky liquid made by crushing almonds in water): from modern Latin emulsio(n-) , from the verb emulgere milk out, from e- (variant of ex- ) out + mulgere to milk.