›something that is unique is unusual or the only one of its type: Fast-growing companies are in a unique position to attract the best candidates.Over the past 15 years, she has made a unique contribution to the country's business environment.a unique opportunity/set of circumstances
›a unique problem, challenge, etc. is difficult to deal with because it has never happened before: The recent financial crisis has posed some unique challenges for governments.
›if something is unique to a place or situation, it only exists in that place or situation: Many of our problems are unique to our profession.