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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



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noun [uncountable] mobility pronunciation in American English /moʊˈbɪləti/
  1. 1
    the ability to move a part of your body

    The accident affected her mobility.

    1. a.
      the ability to move and walk normally
      mobility impaired (=disabled):

      a special entrance for the mobility impaired

      She lost mobility in her left arm as a result of the accident.

    2. b.
      the ability to travel from one place to another

      A car would give you greater mobility.

  2. 2
    the tendency to move between places, jobs, or social classes

    A strong economy offers greater opportunities for social mobility.


… a teaching method in which groups of children learn independently using a computer linked to the internet

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a derogatory word used for referring to people in the banking and investment industry who are thought of as taking serious risks in order to increase their own earnings …

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