1. converts coded information into ordinary language or a readable form
2. figures out the meaning of something that is difficult to understand

Examples

• The computer decodes the encrypted message automatically.
• She decodes the secret cipher using a special key.
• The scientist decodes the DNA sequence in the laboratory.
• He decodes his friend’s confusing text message.
• The software decodes the audio file into readable text.
• The spy decodes the enemy’s radio transmissions.
• The teacher helps students decode complex mathematical problems.