Online Google Dictionary

useful 中文解釋 wordnet sense Collocation Usage
Adjective
/ˈyo͞osfəl/,
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Able to be used for a practical purpose or in several ways,
  1. Able to be used for a practical purpose or in several ways
    • - aspirin is useful for headaches

  1. being of use or service; "the girl felt motherly and useful"; "a useful job"; "a useful member of society"
  2. utilitarian: having a useful function; "utilitarian steel tables"
  3. (usefully) in a useful manner; "extra money could be usefully spent on this project"
  4. (usefulness) utility: the quality of being of practical use
  5. In economics, utility is a measure of relative satisfaction. Given this measure, one may speak meaningfully of increasing or decreasing utility, and thereby explain economic behavior in terms of attempts to increase one's utility. ...
  6. (Usefulness (patent)) In United States patent law, utility is a patentability requirement. Today, the utility requirement is the lowest bar and is easily met. Largely utility is used to prevent the patenting of inoperative devices such as perpetual motion machines. ...
  7. Having a practical or beneficial use
  8. (Usefulness) The importance of something for attaining a goal. See instrumental value.
  9. (Usefulness) The representation should be useful in clinical practice.
  10. Your invention should do what you say it will do
  11. (describes and explains observed phenomena, and can be used predictively)
  12. patent law specifies that inventions must have a useful purpose.
  13. There is a reasonable chance that users will perform a task or change their behavior as the result of the notification.
  14. very very useful n easy to use