rubber

rub·ber

noun \ˈrəb-ər\

Definition of RUBBER

1

: an elastic substance that is obtained by coagulating the milky juice of any of various tropical plants (as of the genera Hevea and Ficus), is essentially a polymer of isoprene, and is prepared as sheets and then dried—called also caoutchouc, india rubber

2

: condom 1