[uncountable and countable]something that you do regularly or usually, often without thinking about it because you have done it so many times beforeCOLLOCATIONS COLLOCATIONS good/bad habit become a habit be in the habit of doing something also have a/the habit of doing something (=do something regularly) get into/in the habit (of doing something) (=start doing something regularly) get out of the habit (of doing something) (=stop doing something regularly) develop/form a habit change a habit break/kick a habit (=stop doing something which is bad for you) change/break the habit(s) of a lifetime (=stop doing what you have done for many years) out of habit/from habit (=because it is a habit) (by/from) force of habit (=because it is a habit which is difficult to change) eating/drinking habits (=the kinds of things you eat or drink regularly) buying/spending habits (=the kinds of things you buy regularly) viewing habits (=the kind of television shows you regularly watch) social habits
the way someone usually thinks about something, or their usual attitudes
[countable]DCRRa long loose piece of clothing worn by people in some religious groups:
a nun's habit
➔ a creature of habit
at creature (3)WORD CHOICE: WORD CHOICE: habit, custom, tradition, practiceA habit is something that you do often, because you have done it many times before.Do not use habit when you are talking about actions or ways of doing things that have existed among a group of people for a very long time. Use tradition or custom. Use tradition when the thing you are referring to has existed for many years, especially when it has been passed down from parents to children• It is a tradition in his family for all first-born males to be called Peter.Use custom to refer to something that is considered normal or polite, especially when you are talking about other countries or other times• the Japanese custom of taking off your shoes when you enter someone's houseUse practice to talk about the usual way of doing something in a particular area of life• the practice of killing animals for their fur
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.