0 a level of importance given to something compared to something else: --
1 in the UK, extra money paid to someone because they work in an area where it is expensive to live: --
2 a value given to each thing in a group to show its importance when compared with others in the group: --
Different auto insurance companies attach different weighting factors and importance to the deductible.
Giving each stock equal weighting means that, overall, the fall has been 9.4%.
Index trackers buy shares in proportion to a company's weighting within a particular market index.