/ ɪˈlæstɪk; NAmE / noun , adjective
[ U ] material made with rubber, that can stretch and then return to its original size :
This skirt needs some new elastic in the waist.
made with elastic :
an elastic headband
able to stretch and return to its original size and shape :
that can change or be changed :
Our plans are fairly elastic.
mid 17th cent. (originally describing a gas in the sense expanding spontaneously to fill the available space ): from modern Latin elasticus , from Greek elastikos propulsive, from elaunein to drive.