Definition of "helicopter"

(aviation) An aircraft that is borne along by one or more sets of long rotating blades which allow it to hover, move in any direction including reverse, or land; and typically having a smaller set of blades on its tail to stabilize the aircraft.  examples

A powered troweling machine with spinning blades used to spread concrete.  examples

(botany) The winged fruit of certain trees, such as ash, elm, and maple.  examples

(zoology, slang) A dragonfly; so named due to its resemblance to a helicopter (sense 1).

A whirling trick performed with devil sticks.  examples

(transitive) To transport by helicopter.  quotations  examples

(intransitive) To travel by helicopter.  examples

To rotate like a helicopter blade.  examples

To overprotect one's children, as a helicopter parent does.  examples