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lead (one) astray
1. To lead one in the wrong direction; to cause one to be lost or in the wrong place. I'm afraid the GPS led us astray. We should have turned right back there. It was only when we saw the waterfall again that we realized our guide had been leading us astray.
2. To misdirect one into error. A few false positives led me astray at first, but I think I have a good idea of the data trends now.
3. To negatively influence one; to influence one to make poor choices. I just hope this new group that my son is hanging out with doesn't lead him astray.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
lead someone astray
to direct or guide someone in the wrong direction. I am afraid that this young man has been leading you astray. I think you had better stop seeing him. No one can lead me astray. I know what I am doing.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.