nul ‧ li ‧ fy /ˈnʌləfaɪ, ˈnʌlɪfaɪ/ BrE AmE verb ( past tense and past participle nullified , present participle nullifying , third person singular nullifies ) [transitive]
1 . law to officially state that something has no legal force:
The election results were nullified because of voter fraud.
2 . formal to make something lose its effect or value SYN cancel out :
Recent inflation could nullify the economic growth of the last several years.
—nullification /ˌnʌləfəˈkeɪʃ ə n, ˌnʌlɪfəˈkeɪʃ ə n/ noun [uncountable]