I. noun 1. a thing which can be added to something else in order to make it more useful, versatile, or attractive • optional accessories include a battery charger and shoulder strap.
2. a small article or item of clothing carried or worn to complement a garment or outfit • she wore the suit with perfectly matching accessories—hat, bag, shoes.
3. (also accessary) —
[Law] someone who gives assistance to the perpetrator of a crime without taking part in it
• she was charged as an accessory to murder.
‹chiefly technical› contributing to or aiding an activity or process in a minor way; subsidiary or supplementary
• functionally the maxillae are a pair of accessory jaws.
III. phrases accessory before (or after) the fact
‹dated› a person who incites or assists someone to commit an arrestable offence (or knowingly aids someone who has committed such an offence).
IV. derivatives accessorial /aksɛˈsɔːrɪəl / adjective
– origin late Middle English: from medieval Latin accessorius ‘additional thing’, from Latin access- ‘increased’, from the verb accedere (see accede).