headspace

Noun

 * 1) The space between the top of the contents of a container (such as a jar) and its seal (such as a lid).
 * 2)  One's mental state.
 * 3)  Unscheduled time for reflection and thinking.
 * 4)  The gap between the face of the bolt and the stopping surface for the cartridge.
 * 5)  The gas phase in contact and in equilibrium with a nonvolatile sample.
 * 1)  Unscheduled time for reflection and thinking.
 * 2)  The gap between the face of the bolt and the stopping surface for the cartridge.
 * 3)  The gas phase in contact and in equilibrium with a nonvolatile sample.
 * 1)  The gap between the face of the bolt and the stopping surface for the cartridge.
 * 2)  The gas phase in contact and in equilibrium with a nonvolatile sample.
 * 1)  The gas phase in contact and in equilibrium with a nonvolatile sample.

Verb

 * 1)  To occupy a headspace.