GRE TOEFL boon Definition A blessing or benefit to someone. Example "The new park was a boon for families in the neighborhood." Sign in to save GRE PDF — $25 TOEFL PDF — $25 ← boom boorish → Study tips featuring "boon" TOEFL Academic Vocabulary: Study by Topic 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