B2a fact or situation that influences the result of something: People's voting habits are influenced by political, social and economic factors.Heavy snow was a contributing factor in the accident.Price will be a major/crucial factor in the success of this new product.The economy is regarded as the decisive/key factor in the outcome of the general election.informalThe film's success is largely due to its feel-good factor (= its ability to make people feel happy).Causing things to happen