American English

Definition of system noun from the Oxford Advanced American Dictionary



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  1. 1[countable] an organized set of ideas or theories or a particular way of doing something the American educational system system for doing something a new system for assessing property taxes system of something a system of government see also binary, metric system
  2. 2[countable] a group of things, pieces of equipment, etc. that are connected or work together a transportation system heating systems a stereo system a security system see also ecosystem, expert system, operating system, public address system, solar system
  3. 3[countable] a human or an animal body, or a part of it, when it is being thought of as the organs and processes that make it function You have to wait until the drugs have passed out of your system. the male reproductive system see also central nervous system, digestive system, immune system
  4. 4the system [singular] (informal) (usually disapproving) the rules or people that control a country or an organization, especially when they seem to be unfair because you cannot change them You can't beat the system (= you must accept it). young people rebelling against the system
  5. Idioms
    get something out of your system (informal)
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    to do something so that you no longer feel a very strong emotion or have a strong desire I was very angry with him, but I think I finally got it out of my system.
See the Oxford Advanced Learner's Dictionary entry: system