GRE TOEFL IELTS lethal Definition Sufficient to cause death; deadly. Example "The snake's bite delivers a lethal dose of venom." Sign in to save GRE PDF — $25 TOEFL PDF — $25 IELTS PDF — $25 ← lesion lethargic → Study tips featuring "lethal" TOEFL Academic Vocabulary: Study by Topic Boost Your IELTS Writing With Precise Vocabulary Related words GRE awe GRE smithereens GRE abacus SAT abase GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate SAT abdomen GRE abduct GRE aberrant