secret writing sec·retw·ri·ting uncommon noun 1. a piece of writing in code or cipher Synonymscryptogramcryptographsecret writing 2. act of writing in code or cipher Synonymscryptographycodingsecret writing Related words Word family code Broader terms writing Narrower terms encodingrecodingdecoding WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.