GRE TOEFL IELTS slumber Definition A state of sleep, especially deep sleep. Example "The baby lay in peaceful slumber, unaware of the noise outside." Sign in to save GRE PDF — $25 TOEFL PDF — $25 IELTS PDF — $25 ← slum slump → Study tips featuring "slumber" 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