Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: head-in-the-clouds
Usage: informal
  1. Guided by whim and fancy
    "head-in-the-clouds young girls";
    - flighty, flyaway, scatterbrained, dippy [informal]

See also: ditsy [N. Amer, informal], ditzy [N. Amer, informal], frivolous