get under

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
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.