come to a dead end

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come to a dead end

1. Literally, to reach the end of a route where one cannot continue traveling. I knew my GPS was wrong when it told me to turn onto a road that came to a dead end.
2. By extension, to reach a point after which no more progress is possible, as in a project. My research has come to a dead end—every experiment I've tried so far has failed.
See also: come, dead, end
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

come to a dead end

 and reach a dead end 
1. Lit. to reach a point where one can go no farther and can turn in no new direction. The road comes to a dead end about a mile farther.
2. Fig. to have run out of possible ideas, solutions, energy, etc. I've come to a dead end. I'm fresh out of ideas. The committee reached a dead end on the matter and tabled the whole business.
See also: come, dead, end
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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