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

     

    avail

     verb
    verb
    BrE BrE//əˈveɪl//
     
    ; NAmE NAmE//əˈveɪl//
     
    Verb Forms present simple I / you / we / they avail
    BrE BrE//əˈveɪl//
     
    ; NAmE NAmE//əˈveɪl//
     
    he / she / it avails
    BrE BrE//əˈveɪlz//
     
    ; NAmE NAmE//əˈveɪlz//
     
    past simple availed
    BrE BrE//əˈveɪld//
     
    ; NAmE NAmE//əˈveɪld//
     
    past participle availed
    BrE BrE//əˈveɪld//
     
    ; NAmE NAmE//əˈveɪld//
     
    -ing form availing
    BrE BrE//əˈveɪlɪŋ//
     
    ; NAmE NAmE//əˈveɪlɪŋ//
     
     
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  1. 1[transitive] avail somebody (something) | avail something (formal or old-fashioned) to be helpful or useful to somebody
  2. 2[transitive, intransitive] (Indian English, non-standard) to make use of something, especially an opportunity or offer avail something To avail all these benefits, just register online. avail of something Why not avail of our special offers?
  3. Word Origin Middle English: from obsolete vail ‘be of use or value’ (apparently on the pattern of pairs such as amount, mount), from Old French valoir, from Latin valere ‘be strong, be of value’. Phrasal Verbsavail yourself of something
See the Oxford Advanced American Dictionary entry: avail