special-purpose code
nounUK /ˈspeʃəl ˈpɜːpəs kəʊd/
US /ˈspeʃəl ˈpɜːrpəs koʊd/
A special-purpose code is a set of secret symbols made just for one job.
The spy used a special-purpose code to send a message that only her team could read.
RELATED WORDS
OTHER MEANINGS
2. A computer program written to do one particular task instead of many.
The engineer wrote a special-purpose code to sort the school's test scores.
3. A short set of letters or numbers used only for a single kind of product or activity.
Each library book has a special-purpose code that shows which shelf it belongs on.
4. A private set of rules for writing messages that only certain people understand.
The club members made a special-purpose code so their meeting notes stayed secret.