invalidator

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in·val·i·date

(ĭn-văl′ĭ-dāt′)

tr.v. in·val·i·dat·ed, in·val·i·dat·ing, in·val·i·dates

To make invalid; nullify.

in·val′i·da′tion n.

in·val′i·da′tor n.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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Noun

invalidator - an official who can invalidate or nullify; "my bank check was voided and I wanted to know who the invalidator was"

voider, nullifier

functionary, official - a worker who holds or is invested with an office

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References in periodicals archive ?

"Invalidator" Strikes Back: the Harbor has Never Been Safe.

La sentencia Schrems del Tribunal de Justicia de la Union Europea: un paso firme en la defensa del derecho a la privacidad en el contexto de la vigilancia masiva transnacional

There are also other things a Muslim should learn such as the invalidators of prayer, its Sunnah acts, its recommended acts, etc.

Prerequisites and essentials of the prayer

Those standing in line at the elections waited for their turn to exercise their right to vote, while some members of the "Mobtiloon" ("Invalidators" or "Voiders") movement stood at a short distance from the committee center, urging people to invalidate their votes - so as for the next president to be aware that he does not enjoy the support of all Egyptians, that he is coming to the post with a meager majority, and that he must seek to prove to those who boycotted the elections, invalidated their votes or voted against him that they were wrong and that he will truly lay the foundations for building a modern state, after the havoc Egypt was subjected to for decades.