Definitions

1. noun

A person or device that decodes, or a person who deciphers a code or message.

“The team of cryptographers used a sophisticated decoder to crack the encryption.”

2. verb

To decipher or decode a message, text, or code.

“The decryption software decoder the encrypted files in a matter of seconds.”

3. noun

In radio communication, a device that converts a modulated radio wave back into its original audio signal.

“The receiver acted as a decoder to convert the radio signal into sound.”