TOEFL IELTS surface Definition The outer or top layer of an object or material. Example "Algae began to grow on the surface of the pond." Sign in to save TOEFL Quiz → IELTS Quiz → ← surcharge surfeit → Study tips featuring "surface" Study the Exact Words Examiners Use Map Each Word Into a Connected Network Audit Your Own Writing for Lexical Resource 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