What does "lie back" mean?

To lie down by moving in a posterior direction, ending up supine.

What is a synonym for "lie back"?

Common synonyms include: recline, reclined, reclining.

verb

verb ·Rare ·Advanced level

Verb

1
To lie down by moving in a posterior direction, ending up supine. intransitive
"The imaging technician told him to lie back and then remain still for a minute."
2
To relax, to exert less effort.
"You can predict that he's going to lie back and take it easy if you let him find out that there's no pressing deadline from the customer on this job."

"The imaging technician told him to lie back and then remain still for a minute."