Definition of helicopter noun from the Oxford Advanced Learner's Dictionary

helicopter

noun

ˈhelɪkɒptə(r) helicopter pronunciation American

ˈhelɪkɑːptər

(also informal copter, chopper)

an aircraft without wings that has large blades on top that go round. It can fly straight up from the ground and can also stay in one position in the air

He was rushed to the hospital by helicopter.a police helicoptera helicopter pilot