de·pen·dence 
/dɪˈpɛndəns/ noun
/dɪˈpɛndəns/ noun : the state of being dependent: such as a : the state of needing something or someone else for support, help, etc. — + on or upon [noncount] ▪ The company was hurt by its dependence on government loans. ▪ Our dependence upon foreign oil makes our economy vulnerable. [singular] ▪ a harmful dependence on foreign oil
b : the state of being addicted to alcohol or a drug [noncount] ▪ drug and alcohol dependence [=addiction, dependency] [singular] — usually + on ▪ She eventually developed a dependence on the painkillers she was taking.
b : the state of being addicted to alcohol or a drug [noncount] ▪ drug and alcohol dependence [=addiction, dependency] [singular] — usually + on ▪ She eventually developed a dependence on the painkillers she was taking.
