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 for Lexical Resource Explain New Words Out Loud To Yourself Audit Your Own Writing to Find Gaps 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