TOEFL IELTS null Definition Having no legal or binding force; invalid. 日本語 無効 Example "The contract was declared null due to fraudulent signatures." Sign in to save TOEFL PDF — $25 IELTS PDF — $25 ← nuisance nullify → Study tips featuring "null" TOEFL Academic Vocabulary: Study by Topic Boost Your IELTS Writing With Precise Vocabulary Related words TOEFL brighten GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze