GRE TOEFL humidity Definition The concentration of water vapor in the atmosphere. Example "High humidity made the summer heat even more unbearable." Sign in to save GRE PDF — $25 TOEFL PDF — $25 ← humid humiliate → Study tips featuring "humidity" 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