Definition of permissible adjective from the Oxford Advanced American Dictionary

 

permissible

 adjective
adjective
NAmE//pərˈmɪsəbl//
 
(formal)
 
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acceptable according to the law or a particular set of rules permissible levels of nitrates in water permissible (for somebody) (to do something) It is not permissible for employers to discriminate on grounds of age.
See the Oxford Advanced Learner's Dictionary entry: permissible