1. The location of:

a. an e-mail sent but not received.

b. any document that you had stored in the cloud and has disappeared.

2. A person who sent an e-mail that wasn't received and is waiting for a response that will never come.
"Dean hasn't responded to my e-mail. I hope he drops me a quick note to let me know I'm not in cyber-limbo."
"You never got my e-mail? It must be somewhere in cyber-limbo."
by pleeca-placca August 20, 2012
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