0 If you come under something, you suddenly experience or suffer it: --
The government is coming under pressure to change the law.
Our armies have come under heavy bombardment.
1 If a piece of information comes under a particular part of a list, book, or collection of things, you can find it in that part: --
2 to be controlled or dealt with by an official organization or a particular part of it: --
Playground guidelines come under the Department of Health and Safety.
3 to experience a bad situation: --