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.
A theory or system of social reform which contemplates a complete reconstruction of society with a more just and equitable distribution of property and labor In popular usage the term is often employed to indicate any lawless revolutionary social scheme See Communism Fourierism Saint Simonianism forms of socialism...