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

 

occasion

 verb
verb
BrE BrE//əˈkeɪʒn//
 
; NAmE NAmE//əˈkeɪʒn//
 
Verb Forms present simple I / you / we / they occasion
BrE BrE//əˈkeɪʒn//
 
; NAmE NAmE//əˈkeɪʒn//
 
he / she / it occasions
BrE BrE//əˈkeɪʒnz//
 
; NAmE NAmE//əˈkeɪʒnz//
 
past simple occasioned
BrE BrE//əˈkeɪʒnd//
 
; NAmE NAmE//əˈkeɪʒnd//
 
past participle occasioned
BrE BrE//əˈkeɪʒnd//
 
; NAmE NAmE//əˈkeɪʒnd//
 
-ing form occasioning
BrE BrE//əˈkeɪʒnɪŋ//
 
; NAmE NAmE//əˈkeɪʒnɪŋ//
 
 
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(formal) to cause something occasion something The flight delay was occasioned by the need for a further security check. The injury was believed to have occasioned his death. occasion somebody something The decision occasioned us much anxiety. Word Origin late Middle English: from Latin occasio(n-) ‘juncture, reason’, from occidere ‘go down, set’, from ob- ‘towards’ + cadere ‘to fall’.
See the Oxford Advanced American Dictionary entry: occasion