something that you do regularly or usually, often without thinking about it because you have done it so many times before Habit · Break a habit · Habit-forming · Kick the habit

to get money in order to pay for a bad habit, especially taking drugs. He turned to crime to support his habit.

if something has a habit of doing something, it usually or often does it – used humorously. Life has a habit of springing surprises.

a drug or activity that is habit-forming makes you want to keep taking it, keep doing it etc. Examples from the Corpus habit-forming.

From Longman Dictionary of Contemporary Englishhabit of thought/mindhabit of thought/mindATTITUDEthe way someone usually thinks about something, ...

someone who always does things in the same way or at the same time → creature Examples from the Corpus a creature of habit

to stop doing something that is a harmful habit, such as smoking, taking drugs etc. The scheme helps smokers to kick the habit.

to stop doing something that you do regularly, especially something that you should not do. a new drug which helps smokers to break their habit.

used to say that someone does not usually do something bad or wrong, or should not do it again.

1. HABIT[only before noun] doing something from habit, and unable to stop doing it habitual criminal/offender habitual drinker/smoker/gambler