supplement

Universal Words noun, verb noun 1 ~ (to sth) a thing that is added to sth else to improve or complete it: vitamin / dietary supplements (= vitamins and other foods eaten in addition to what you usually eat) * Industrial sponsorship is a supplement to government funding. 2 an extra separate section, often in the form of a magazine, that is sold with a newspaper: the Sunday colour supplements 3 ~ (to sth) a book or a section at the end of a book that gives extra information or deals with a special subject: the supplement to the Oxford English Dictionary * a supplement to the main report 4 an amount of money that you pay for an extra service or item, especially in addition to the basic cost of a holiday/vacation: There is a ｣10 supplement for a single room. * Safety deposit boxes are available at a supplement. verb [VN] ~ sth (with sth) to add sth to sth in order to improve it or make it more complete: a diet supplemented with vitamin pills * He supplements his income by giving private lessons.