The absence of material or an area devoid of materials where not intended.

An empty space. In relation to geology the empty space between grains in the soil or a rock.

Air pockets in the part which have opened or were not filed with material, leaving an opening or hole.

(1) Holes on the outside of the pipe in the surrounding soil or material. (2) A term generally applied to paints to describe holidays, holes, and skips in the film. Also used to describe shrinkage in castings or welds.

Coating defect: holes in a coating application.

skips, holes in a film

Are the openings or pores in a filter medium.

A general term for pore spaces or other openings in rock.

The openings in the medium. Also referred to as interstices or pores.

White spots in areas of electrostatic output that should have colour. Commonly the result of airborne particles preventing the charged toner from adhering to the charged paper. Can also result from dirt in paper.

A letting void is any period when the property is not subject to tenancy and therefore the landlord is not receiving any rental income. During any such periods not only is the landlord not receiving an income but also his costs will increase. In addition to insurance and mortgage payments that he may have to make, he may incur costs in respect to connected utilities and will be responsible for Council Tax and Leasehold Ground Rent and Maintenance charges. There are two void periods that an investor must take into account: The period between completion of the purchase of the property and the first tenant moving in. Given the time taken to re-fit the property for tenancy, a period of 3 to 4 weeks should be allowed. The period between a present tenant moving out and a new tenant moving in. Typically, the industry allows a period of 4 weeks per year.

Enclosed portions of a building where fire can spread undetected.

Percent voids. - Indicates a washed coarse aggregate.

SEE void volume.