To extend or spread something to its full length. She stretched out the blanket on the grass for the picnic.
To lie down with one's body fully extended. After a long day, he stretched out on the couch to relax.
To extend one's limbs or body to reach something. He stretched out his arm to grab the book from the top shelf.
To prolong or extend something in time or space. The meeting was stretched out to cover all the agenda items.