Simple Definition of decode

from our Learner's Dictionary

decode

verb

decodes; decoded; decoding
1
: to change (secret messages, documents, etc.) from a set of letters, numbers, symbols, etc., you cannot understand into words you can understand
The government agents finally decoded [=deciphered] the message.
2
: to find or understand the true or hidden meaning of (something)
Readers can easily decode the novel's imagery.
I'm trying to decode the expression on her face.
3
technical : to change signals for a radio, television, etc., to a form that can be heard or seen correctly
The box decodes the digital signal for your CD player.

Cite this Entry

“Decode.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/decode. Accessed 20 Jun. 2026.

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