warn (one) off (from someone or something)

warn (one) off (from someone or something)

To caution someone to leave or not to come near something. The first noun or pronoun can also come after "off." The government put up signs warning off any potential hikers from the area. I held my shotgun across my chest as I warned the ruffians off from my land.
See also: off, someone, warn
Farlex Dictionary of Idioms.

warn someone off

to advise a person to stay away. We placed a guard outside the door to warn people off until the gas leak could be fixed. The guards warned off everyone in the vicinity.
See also: off, warn
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

warn off

v.
To notify someone to go or stay away: The sheriff warned them off the private property.
See also: off, warn
The American Heritage® Dictionary of Phrasal Verbs.
See also:
  • check off
  • base off (of) (something else)
  • bite off
  • blow off
  • blow someone/something off
  • blow off the map
  • brass off
  • brass someone off
  • brassed off
  • cheese someone off