(Law) One who, not being present, contributes as an assistant or instigator to the commission of an offense. Accompanying, as a subordinate; additional; accessory; esp., uniting in, or contributing to, a crime, but not as chief actor. One who participates in the commission of an offense, either by advice, command, instigation, or concealment, before or after the offense is committed, though not present at the committal. See Accessory. This word, as used in law, is spelt accessory by Blackstone and many others; but in this sense is spelt accessary by Bouvier, Burrill, Burns, Whishaw, Dane, and the Penny Cyclopedia; while in other senses it is spelt accessory. In recent text-books on criminal law the distinction is not preserved, the spelling being either accessary or accessory.