say it: ak-SES-ur-ee
accessory is a noun and adjective meaning "clothing that is worn or carried, but not part of your main clothing". It carries 5 recorded senses.
clothing that is worn or carried, but not part of your main clothing
a supplementary component that improves capability
someone who helps another person commit a crime
aiding and abetting in a crime
“he was charged with being accessory to the crime”
furnishing added support
“an ancillary pump”
“an adjuvant discipline to forms of mysticism”
“The mind and emotions are auxiliary to each other”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for accessory come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.