TOEFL IELTS prime Definition Of the best quality or most important; first in order or value. Example "She was in prime condition for the marathon." Sign in to save TOEFL Quiz → IELTS Quiz → ← primate primeval → Study tips featuring "prime" Map Each Word Into a Connected Network Audit Your Own Writing for Lexical Resource Track How TOEFL Words Behave With Others Related words TOEFL brighten GRE abash GRE abate GRE abbreviate GRE abbreviation SAT abdicate GRE abduct SAT abet GRE abhor GRE abide SAT abject TOEFL ablaze