GRE TOEFL IELTS colossal Definition Extremely large in size, scale, or degree. Example "The discovery was a colossal breakthrough for modern medicine." Sign in to save GRE Quiz → TOEFL Quiz → IELTS Quiz → ← colony colt → Study tips featuring "colossal" Study the Exact Words Examiners Use Group Words Together by Emotional Tone Map Each Word Into a Connected Network 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