keep one's mind on so or sth meaning

[American slang]
to concentrate on someone or something.
  He is keeping his mind on Jane instead of his work.
  I find it hard to keep my mind on my reading.

• keep so or sth in mind:    [American slang]to ...
• keep sth in the back of so's mind:    [American slang]Go ...
• have so or sth on one's mind:    [American slang](M ...