Definition of pledge verb from the Oxford Advanced Learner's Dictionary

     

    pledge

     verb
    verb
    BrE BrE//pledʒ//
     
    ; NAmE NAmE//pledʒ//
     
    Verb Forms present simple I / you / we / they pledge
    BrE BrE//pledʒ//
     
    ; NAmE NAmE//pledʒ//
     
    he / she / it pledges
    BrE BrE//ˈpledʒɪz//
     
    ; NAmE NAmE//ˈpledʒɪz//
     
    past simple pledged
    BrE BrE//pledʒd//
     
    ; NAmE NAmE//pledʒd//
     
    past participle pledged
    BrE BrE//pledʒd//
     
    ; NAmE NAmE//pledʒd//
     
    -ing form pledging
    BrE BrE//ˈpledʒɪŋ//
     
    ; NAmE NAmE//ˈpledʒɪŋ//
     
     
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  1. 1[transitive] to formally promise to give or do something pledge something Japan has pledged $100 million in humanitarian aid. The government pledged their support for the plan. pledge something to somebody/something We all had to pledge allegiance to the flag (= state that we are loyal to our country). pledge to do something The group has pledged to continue campaigning. pledge (that)… The group has pledged that they will continue campaigning.
  2. 2[transitive] to make somebody or yourself formally promise to do something synonym swear pledge somebody/yourself (to something) They were all pledged to secrecy. pledge somebody/yourself to do something The government has pledged itself to root out corruption.
  3. 3[transitive] pledge something to leave something with somebody as a pledge (2)
  4. 4[intransitive, transitive] (North American English) to promise to become a junior member of a fraternity or sorority Do you think you'll pledge this semester? pledge something My brother pledged Sigma Nu.
  5. Word Origin Middle English (denoting a person acting as surety for another): from Old French plege, from medieval Latin plebium, perhaps related to the Germanic base of plight (verb).Extra examples Japan pledged $100 million in humanitarian aid. Politicians of all parties pledged their support for the idea. The bill would require schoolchildren to pledge allegiance to the flag. The country pledged not to interfere in its neighbour’s affairs. The government has pledged that it will not raise taxes.
See the Oxford Advanced American Dictionary entry: pledge