There are several access control models available for multiple domain environments. Applying role based access control for inter-domain services of multiple domain environment meet the challenges such as mapping of inter-domain role hierarchy, separation of duty constraints on role conflict, service conflict and location conflict. In the recent times, ontology based access control is introduced for various domain of interest. The main purpose of this paper is representing inter-domain access permissions of multiple domain environments using ontology which is the formal and explicit representation of a domain of interest through their concepts and their associations. To attain this objective, we propose a procedure to transform the access permission matrix of multiple domain environments into inter-domain access control ontology. The implementation shows that it is possible to formalize ontology for access permission of inter-domain security policy without any conflicts in terms of inter-domain roles, services and domains in multiple domain environments. © 2015 IEEE.