thin air

1. 1.

   nowhere to be found in a giant void

   “it vanished into thin air”

   Broadernothingness

Questions about thin air

What does thin air mean?

thin air means "nowhere to be found in a giant void".

Is thin air a common word?

thin air is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.