—n. (pl. -ies)
1 an additional or extra thing.
2 (usu. in pl.) a a small attachment or fitting. b a small item of (esp. a woman's) dress (e.g. shoes, gloves, handbag).
3 (often foll. by to) a person who helps in or knows the details of an (esp. illegal) act, without taking part in it.
—adj. additional; contributing or aiding in a minor way; dispensable.
Phrases and idioms:
accessory before (or after) the fact a person who incites (or assists) another to commit a crime.
Derivatives:
accessorial adj.
Etymology: med.L accessorius (as ACCEDE)
Useful english dictionary. 2012.