From Longman Dictionary of Contemporary Englishthe worstthe worstWORSEthe person or thing that is worse than all others → the bestworst (that) This year’s harvest is the worst that people can remember. Last year was by far the worst (=much worse than any other) for road accidents. I think the worst is over now. The worst of it is (=the worst part of the situation is), I can’t tell anyone what’s happening.at its/his etc worst You saw the garden at its worst, I’m afraid (=when it is worse than at any other time). → worst
