Here's what to do and/or use to tell someone a secret without being overheard:
1. Whisper
2. Mouthing of Words
3. Sending a signal only the recipient can comprehend
4. Write a letter
5. Write a letter with codes to be deciphered by the recipient
6. Use technology. Send a personal message via chat, text, or email
7. Call (phone or mobile phone)
8. Millennial Style: Send memes the recipient can only decode
9. If you want to be traditional or old school, use Morse code
10. Create new language or codes only the two of you can understand
