Headspace is a term that is used in psychology. It refers to the empty space in your mind that is reserved for thinking, planning, and working.
You should try to get into headspace before you start your homework.
When you're in headspace, you're focused and you're able to think more clearly.
noun
the volume left at the top of a filled container (bottle or jar or tin) before sealing
1
The cartridge headspaces on the belt.
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The cartridge headspaces on the mouth of the case at the L3 datum reference.
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The cartridge headspaces on the rim.
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Either that or an operator headspace error.
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Including headspace and much more.
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The cartridge headspaced on the mouth of the case.
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The cartridge headspaces on the mouth of the case.
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Firearm cartridges with otherwise problematic headspace.
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Headspace for rimmed cartridges is the thickness of that rim.
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Both cartridges headspace on the mouth of the case.