As a Noun: 1. Something you do often and regularly. English = habit. 2. An action that someone has done many times before and finds difficult to stop, especially when this action is considered to be bad. English = habit. 3. The condition of taking harmful drugs and being unable to stop taking them. English = addiction. As a Verb or Adjective: 1. To be or relate to a habit. English = (be) habitual. 2. To be unable to stop taking a harmful drug. English = (be) addicted to. Idiomatic English = (be) hooked on. As Modifier: 1. Used immediately next to a verb to mean the action of the verb is done often and regularly and that the actor finds it difficult not to do it. English = habitually.