accessory accessory /əkˈsɛsəri/

adjective

1. Furnishing added support  ( accessory , adjunct , adjuvant , ancillary , appurtenant , auxiliary )
   furnishing added support
    An ancillary pump
   an ancillary pump
    An adjuvant discipline to forms of mysticism
   an adjuvant discipline to forms of mysticism
    The mind and emotions are auxiliary to each other
   The mind and emotions are auxiliary to each other
   
2. Aiding and abetting in a crime  ( accessary , accessory )
   aiding and abetting in a crime
    He was charged with being accessory to the crime
   he was charged with being accessory to the crime
   

noun

1. () A supplementary component that improves capability  ( add-on , appurtenance , bolt-on , accessory , supplement )
   a supplementary component that improves capability
   
2. () Clothing that is worn or carried, but not part of your main clothing  ( accoutrement , accessory , accouterment [American] )
   clothing that is worn or carried, but not part of your main clothing
    A well-chosen accessory can take a basic outfit to the next level and make a statement
   A well-chosen accessory can take a basic outfit to the next level and make a statement
   
   
3. Someone who helps another person commit a crime  ( accessary , accessory )
   someone who helps another person commit a crime