As a Noun: 1. The condition of taking harmful drugs and being unable to stop taking them. English = addiction. 2. A hook used for catching fish. English = fishing hook, hook. As a Verb or Adjective: 1. To be unable to stop taking a harmful drug. English = (be) addicted. Idiomatic English = (be) hooked on. 2. To catch a fish, to hook a fish.