shut down

verb8

1. •
   To close, terminate, or end; to stop operating, either permanently or temporarily.

   • The store was shut down at the end of the year.
   • The company shuts down underperforming lines.
2. •
   To turn off or stop.

   • It's a good idea to shut down the machine before you leave.
   • My computer is shutting down as we speak.
3. •
   To stop offering a service, such as a bar; to perform the necessary tasks to stop a service or close a function.

   • The restaurant shuts down at two o'clock in the morning.
   • Mary will shut down the breakfast buffet at ten-thirty.
4. •
   (figurative) To suppress, block out, or reject something.

   • She made a proposal to reorganize the department, but management shut her down.
   • I asked her out, but she shut that down.
5. •
   (figurative) To render (something) ineffective.

   • We shut down the other team's strategy.
6. •
   (figurative) To emotionally withdraw into oneself as a defense mechanism; to block out external stressors.

   • I can't talk to him about the accident; he just shuts down anytime I try.
7. •
   (slang) To pass (another vehicle), especially quickly.

   • I opened that throttle and shut him down.
8. •
   (old-fashioned) To become dark.

   • Once the night shut down, I couldn't see my way home.