American English

Definition of underpin verb from the Oxford Advanced American Dictionary

     

    underpin

     verb
    verb
    NAmE//ˌʌndərˈpɪn//
     
    Verb Forms present simple I / you / we / they underpin
     
    he / she / it underpins
     
    past simple underpinned
     
    -ing form underpinning
     
     
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  1. 1underpin something (formal) to support or form the basis of an argument, a claim, etc. The report is underpinned by extensive research.
  2. 2underpin something (technology) to support a wall by putting metal, concrete, etc. under it
underpinning
 
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NAmE//ˈʌndərˌpɪnɪŋ//
 
noun [countable, uncountable]
See the Oxford Advanced Learner's Dictionary entry: underpin