miss by a mile

miss (something) by a mile

To fail or fall short (of something) by a very wide margin. I thought she would appreciate such a practical present for her birthday, but it looks like I missed by a mile. He kept boasting about how good he is at horseshoes, but he missed by a mile every time he went up to throw.
See also: by, mile, miss
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

miss (something) by a mile

Fig. to fail to hit something by a great distance; to land wide of the mark. Ann shot the arrow and missed the target by a mile. "Good grief, you missed by a mile," shouted Sally.
See also: by, mile, miss
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

miss by a mile

Fall short, fail by a considerable amount, as in Your guess as to the winner missed by a mile. This expression employs miss in the sense of "fail to hit something aimed at," a usage dating from the late 1400s, and by a mile for a great distance or interval, so used since Shakespeare's day.
See also: by, mile, miss
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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