back of (one's) mind

back of (one's) mind

Referring to something that one thinks of, but with little or no conscious or active consideration or reflection. Despite my success at work, there's always this worry in the back of my mind that I'm doing something wrong. You don't need to do anything about it now—just keep it in the back of your mind going forward.
See also: back, mind, of
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

back of one's mind

The remote part of one's mind or memory, as in With the idea of quitting in the back of his mind, he turned down the next assignment. [c. 1900]
See also: back, mind, of
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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