Definition of blowhole in English:


Syllabification: blow·hole
Pronunciation: /ˈblōˌhōl


  • 1A hole for blowing or breathing through, in particular.
    More example sentences
    • Rokare blew a spray of water from her blowhole, narrowly missing him.
    • I see no gills and no blowhole, just a nose in the middle of their face.
    • Similar to a dolphin or a whale, I suppose, I have hair, I breathe oxygen (through a blowhole, my nostrils are olfactory only), my mother nursed me, and I am warm-blooded.
  • 1.1The nostril of a whale on the top of its head.
    More example sentences
    • While the rest of us stood agog as the spray from the whales' blowholes misted over the deck, three divers managed to slip into the water.
    • A calf will hump up onto the back of the sleeping mother, breach onto her, cover her blowhole with his tail.
    • When they dive, muscles close the blowhole and their ribcage collapses to keep air bubbles from forming in the bloodstream.
  • 1.2A hole in ice to which seals, whales, and other aquatic animals come to breathe.
    More example sentences
    • Soon you come across a blowhole forming a vertical shaft 1.5m in diameter that leads to the surface.
    • Polar bears will stand or lie by the seal’s blowhole in the ice for hours; they may swim towards seals resting on the ice flows with only their nose showing above the water.
    • A burly man raises a stick with a hook on the end to strike a baby seal as it surfaces from a blowhole in the ice.
  • 1.3A vent for air or smoke in a tunnel or other structure.
    More example sentences
    • It has blowholes and lava tubes, the wettest spot on earth, and the nation's only royal palace.
    • This can probably be attributed to the top blowhole wicking away the rising hot air.
    • Tunnels and Caves is another popular site, starting and finishing through a blowhole that leads to an underwater playground of caves and tunnels, where bubbles escape through volcanic fissures.
  • 1.4A cavity in a metal casting, produced by the escape of air through the liquid metal.
    More example sentences
    • The invention provides an apparatus and a method for reducing the volume of risers, and for the possibility of reducing shrinkage, blowhole and porosity in shaped gravity casting.
    • A third fault or defect type is blowhole formation due to air and gas inclusions, which arise during casting, but mainly in the phase just before the end of casting.
    • Producers of iron castings sometimes are confronted by a rash of blowhole or pinhole defects that take time and money to correct.

More definitions of blowhole

Definition of blowhole in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day maelstrom
Pronunciation: ˈmālˌsträm
a powerful whirlpool in the sea