two-way

Adjective

• operating or permitting operation in either of two opposite directions
  • a two-way valve
    
  • two-way traffic
    
  • two-way streets
    

• involving two parts or elements
  • a bipartite document
    
  • a two-way treaty
    

• supported by both sides
  • a two-way treaty
    

Related words

• Synonyms: 
  bipartite , two-part , bipartisan , bipartizan , two-party