A glossy colour magazine issued with a newspaper, typically covering arts, fashion, lifestyle, etc.

plural of colour supplement

(automotive) Any of several restraining systems in a vehicle, such as an airbag, in addition to the seatbelts

plural of supplemental restraint system

(US) a federal program that provides food-purchasing assistance for low-income individuals

(geometry) plural of supplementary angle

(geometry) A pair of angles that sum to 180 degrees.

Additional; added to supply what is wanted.

Something additional; an extra.

(geometry) An angle that, when added to another referenced angle, produces an angle of 180 degrees.