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null and void

Cliché without legal force; having no legal effect. The court declared the law to be null and void. The millionaire's will was null and void because it was unsigned.
See also: and, void

fill the void

also fill a void
to replace or provide something necessary It is impossible to fill the void left by my sister's death.
See also: fill, void

fill a/the void

to replace something important that you have lost, or to provide something important that you need The country needs a strong leader to help fill the void left by the death of the president. Religion helped me fill a void in my life.
See also: fill, void

null and void

Canceled, invalid, as in The lease is now null and void. This phrase is actually redundant, since null means "void," that is, "ineffective." It was first recorded in 1669.
See also: and, void
References in periodicals archive ?
BTC stencil design should consider component "float" in addition to voiding.
These features significantly reduce voiding when preforms are used with BTCs such as QFNs.
For those with retention or other voiding problems, intermittent catheterization and watchful waiting may be an option, but surgery is the only definitive intervention.
In general, the prevalence of abnormal urinary voiding in the acute postpartum period is high: 30%-50%, she said.
Patients who initially complained of voiding more than two times per night tended to show greater improvement than those who voided twice per night.
This enables you to see voiding patterns, which can help to prevent incontinence episodes.
Physicians should carefully question patients about their voiding symptoms, she suggested.
This implied a hemodynamic response with provision of increased oxygenated blood volume which was followed by successful voiding.
Voiding has a variety of causes, including the properties of the flux and the reflow profile.
The tendency to higher levels of voiding has been rationalized on the basis of differences in physical properties between SnPb and Pb-free solders.
It also records these episodes so that staff can establish a voiding pattern for the particular resident and can develop a specific toileting program.
While this can have a significant long-term effect on the building, it may have an immediate effect on voiding your roof warranty.
It is the purpose of this and the next few columns to discuss voiding and its causes in detail.