at door

at (one's) door

1. Literally, outside one's door. I'm at your door right now—where are you?
2. By extension, one's responsibility. That issue is at the police commissioner's door now. I always hire reputable contractors for my company because I don't want complaints of shoddy construction at my door.
3. Very close to one's location, especially of an unwanted thing that is encroaching. We used to think of it as a skirmish on the frontier, but the war is now at our door. This whole area used to be rural, but with rampant development, the suburbs are at our door.
See also: door
Farlex Dictionary of Idioms.

at (someone's) door

As a charge holding someone responsible: You shouldn't lay the blame for the fiasco at her door.
See also: door
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • at (one's) door
  • at one's door
  • darken (one's) door
  • darken door
  • darken someone's door
  • darken
  • welcome mat
  • welcoming mat
  • door to door
  • door-to-door
References in periodicals archive
Residents wear tags, and if they go within a certain distance of the part of the system that can detect the tag, usually placed at doors, an alarm goes off.
Why residents wander--and what you can do about it. (Feature Article)