Webster's English Dictionary

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code

1. code \'ko-d\ n [ME, fr. MF, fr. L caudex, codex trunk of a tree, tablet 
   of wood co]vered with wax for writing on, book; akin to L cudere to beat 1: 
   a systematic statement of a body of law; esp : one given statuto ry force 
   2: a system of principles or rules  3: a system of signals for 
   communication; also : a system of words  or other symbols arbitrarily used 
   to represent words
2. code vt : to put in or into the form or symbols of a code  - cod.er n