Definition of "wingtip"

wingtip

noun
plural wingtips
1. The extreme tip of the wing of an aircraft, bird, flying insect, etc.
  Quotations
  They're wonderful hoverers, though, and they'll remain stationary in the air, wing-tips vibrating, till they've marked their prey[.]
  1934, Henry G. Lamond, An Aviary on the Plains, Sydney: Angus and Robertson, page 13
  The poor but lovely bird sat there, posing among the celandines and wood anemones, wondering why its wing-tips were frozen together.
  2000, Bill Oddie, Gripping Yarns, page 26
2. A part of a shoe, often with brogueing that extends backwards on both sides from the toe
  1. (US) A brogue (shoe)
    Quotations
    Then, immaculately dressed in three-piece suit, starched collar, and wingtips, Wilbur was obliged to drive a spike of Nevada silver into a railroad tie, a tricky and potentially embarrassing ceremonoial duty, especially with a phalanx of eager photographers poised to record every misswing.
    2014, Joseph E. Stevens, Hoover Dam: An American Adventure