nullifier
nul·li·fier
noun
2.
an official who can invalidate or nullify
- “my bank check was voided and I wanted to know who the invalidator was”
Origin
From nullify + -er.
Related words
Word family
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.