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Definition of spy verb from the Oxford Advanced American Dictionary

     

    spy

     verb
    verb
    NAmE//spaɪ//
     
    Verb Forms present simple I / you / we / they spy
     
    he / she / it spies
     
    past simple spied
     
    -ing form spying
     
     
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  1. 1[intransitive] to collect secret information about another country, organization, or person He spied for his government for more than ten years.
  2. 2[transitive] spy somebody/something (literary or formal) to suddenly see or notice someone or something In the distance we spied the Pacific for the first time.
  3. Phrasal Verbsspy onspy out
See spy in the Oxford Advanced Learner's Dictionary