IELTS single Definition One only; not one of several, multiple, or married; individual. Example "She lives in a single room on the top floor." Sign in to save IELTS PDF — $25 ← sinewy singular → Study tips featuring "single" Boost Your IELTS Writing With Precise Vocabulary Related words TOEFL brighten IELTS startle GRE abide SAT abnormal TOEFL aboard TOEFL abolition IELTS upward TOEFL abort IELTS abortion SAT abrupt SAT absence TOEFL absent