IELTS tighten Definition To make something firmer, tighter, or more secure. Example "He used a wrench to tighten the loose bolt." Sign in to save IELTS Quiz → ← tiff tile → Study tips featuring "tighten" Audit Your Own Writing to Find Gaps Boost Your IELTS Writing With Precise Vocabulary Related words IELTS sincere GRE abide SAT abnormal TOEFL aboard TOEFL abolition TOEFL abort IELTS abortion SAT abrupt SAT absence TOEFL absent GRE absolute TOEFL absolutely