get under

get under (something)

Literally, to move or position oneself underneath or below something. The kids got under the covers, and I started reading their bedtime story. Ugh, the mouse got under the bookshelf somehow—we'll never catch him now!
See also: get
Farlex Dictionary of Idioms.

get under something

to get beneath something. The cat came in and got under the sofa where she couldn't be seen. Why don't you get under the table where Billy won't find you?
See also: get
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • get under (something)
  • keep (someone or something) in sight
  • keep in sight
  • keep sight of
  • keep sight of (someone or something)
  • keep sight of somebody/something
  • kick (oneself) for (doing something)
  • bedtime
  • bedtime story
  • leave oneself wide open for
References in periodicals archive
With less new aircraft, and with some wonderful oldies flying too, after the first day, the actual air display program did not actually get under way until 1pm, more like Farnborough, and starting with the helicopters.
The 2005 Paris Air Show