GRE TOEFL IELTS dull Definition lacking interest or excitement; not sharp or bright. Example "The lecture was so dull that half the class fell asleep." Sign in to save GRE PDF — $25 TOEFL PDF — $25 IELTS PDF — $25 ← dulcet duly → Study tips featuring "dull" 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