Definition of circle verb from the Oxford Advanced American Dictionary

     

    circle

     verb
    verb
    NAmE//ˈsərkl//
     
    Verb Forms present simple I / you / we / they circle
     
    he / she / it circles
     
    past simple circled
     
    -ing form circling
     
     
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  1. 1[intransitive, transitive] to move in a circle, especially in the air circle (around) (above/over somebody/something) Seagulls circled around above his head. He flew lower and circled around the lake. circle something The plane circled the airport to burn up excess fuel.
  2. 2[transitive] circle something to draw a circle around something Spelling mistakes are circled in red ink.
  3. Idioms
    circle the wagons
     
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    to join together with people who have the same ideas and beliefs as you, and avoid contact with those who do not, who may threaten, or attack you When your way of life is threatened you have to circle the wagons and defend yourself. They immediately circled the wagons around the senator to protect him. From the practice of arranging a wagon train in a circle, to defend against attack.
See the Oxford Advanced Learner's Dictionary entry: circle