obturation definition

  • noun:
    • The work of preventing up, or finishing, an opening.
    • The process of a bullet growing under great pressure to match the bore of the firearm, or a cartridge instance growing under some pressure to seal the chamber.
    • The work of preventing up, or closing, an opening.
    • The act of closing or stopping up, and/or state or problem of being obstructed or closed.
    • Specifically, in gunnery, the work of shutting a hole, joint, or cavity in order to avoid the movement of gasoline through it: as, the obturation of a vent, or of a powder-chamber. See fermeture, gas-check, obturator.

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