GRE TOEFL uncharted Definition Not yet explored, mapped, or understood. Example "They ventured into the uncharted waters of the southern ocean." Sign in to save GRE PDF — $25 TOEFL PDF — $25 ← uncanny unconditional → Study tips featuring "uncharted" 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