Definitions from Wiktionary ( )

▸ noun:  (aircraft) 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.
▸ noun:  A powered troweling machine with spinning blades used to spread concrete.
▸ noun:  (botany) The winged fruit of certain trees, such as ash, elm, and maple.
▸ noun:  (zoology, slang) A dragonfly; so named due to its resemblance to a helicopter (sense 1).
▸ noun:  A whirling trick performed with devil sticks.
▸ noun:  (dance) A breakdance move in which the dancer spins on the floor while extending the legs to resemble the blades of a helicopter.
▸ verb:  (transitive) To transport by helicopter.
▸ verb:  (intransitive) To travel by helicopter.
▸ verb:  To rotate like a helicopter blade.
▸ verb:  To overprotect one's children, as a helicopter parent does.

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