1. a device or program that converts coded information into a readable or usable form
Usage: technology
2. a person who decodes or deciphers coded messages

Examples

• The cable box has a built-in decoder for digital signals.
• She used a decoder to convert the encrypted file.
• The DVD player’s decoder processes the compressed video data.
• Military decoders worked around the clock during wartime.
• The software includes a decoder for multiple audio formats.
• He bought a universal decoder for his satellite receiver.
• The decoder ring revealed the secret message.