#1 accessory n. [accoutrement, accouterment] clothing that is worn or carried, but not part of your main clothing. wn
#2 accessory n. [appurtenance, supplement, add-on] a supplementary component that improves capability. wn
#3 accessory s. [accessary] aiding and abetting in a crime; "he was charged with being accessory to the crime". wn
#4 accessory s. [adjunct, ancillary, adjuvant, appurtenant, auxiliary] furnishing added support; "an ancillary pump"; "an adjuvant discipline to forms of mysticism"; "The mind and emotions are auxiliary to each other". wn
#5 accessory n. [accessary] someone who helps another person commit a crime. wn
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