simple past tense and past participle of stretch
"The rubber band stretched when I pulled it apart."
In plain English: To stretch something means to pull it so that it gets longer and thinner, often until it might break if you keep pulling.
"He stretched his arms above his head after waking up from lunch."
(of muscles) relieved of stiffness by stretching
"well-stretched muscles are less susceptible to injury"
extended or spread over a wide area or distance
"broad fields lay stretched on both sides of us"