Addiction/əˈdɪkʃn/ Definition 1 of 4Pro Tip 1/3Difficult Control Remember, 'addiction' implies a loss of control over actions or behavior. Even after losing his job, his addiction to gambling continued. Pro Tip 2/3Negative Impact 'Addiction' often suggests consequences that harm oneself or others. Her addiction to her work led to neglecting her family. Pro Tip 3/3Physical or Psychological Addiction can be for substances or behaviors, affecting both mind and body. Many people struggle with addiction to smartphones.