Meaning of ACCESSORY in English

ACCESSORY

ac ‧ ces ‧ so ‧ ry /əkˈsesəri/ BrE AmE noun ( plural accessories ) [countable]

1 . [usually plural] something such as a piece of equipment or a decoration that is not necessary, but that makes a machine, car, room etc more useful or more attractive:

bathroom accessories such as mirrors and towel-rails

2 . [usually plural] something such as a bag, belt, or jewellery that you wear or carry because it is attractive:

fashion accessories

a set of fully matching clothes and accessories

3 . someone who helps a criminal, especially by helping them hide from the police

accessory to

an accessory to murder

an accessory before/after the fact (=someone who helps a criminal before or after the crime)

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.