The adjective worst describes the thing that is the least good, like this awful pizza, the worst we've ever had in our lives.

Worst means "the least favorable outcome." You may have heard the saying "hope for the best but expect the worst." Well, it you get the worst, you know there is nothing more bad than that. If you are at your worst, you have never before felt or performed this poorly. Don't confuse worst with worse, which compares only two things. Your cold might be worse than your brother's but dad's is the worst of all.

Definitions of worst

n the least favorable outcome

“the worst that could happen”
Type of:
final result, outcome, result, resultant, termination
something that results

n the weakest effort or poorest achievement one is capable of

“it was the worst he had ever done on a test”
the supreme effort one can make
Type of:
attempt, effort, endeavor, endeavour, try
earnest and conscientious activity intended to do or accomplish something

n the greatest damage or wickedness of which one is capable

“the invaders did their worst
“so pure of heart that his worst is another man's best”
Type of:
evil, evilness
the quality of being morally wrong in principle or practice

adj (superlative of `bad') most wanting in quality or value or condition

“the worst player on the team”
“the worst weather of the year”
the lowest rank
last, last-place, lowest
lowest in rank or importance
pessimal, pessimum
of an organism's environment; least favorable for survival
having undesirable or negative qualities
of low or inferior quality
(superlative of `good') having the most positive qualities
champion, prizewinning
holding first place in a contest
high-grade, top-grade, top-quality
surpassing in quality
first, foremost, world-class
ranking above all others
Sunday-go-to-meeting, go-to-meeting
used of clothing
optimal, optimum
most desirable possible under a restriction expressed or implied
the best of its kind
surpassing any previously established record
next to the best
(used especially of merchandise) very fine in quality
unexceeded, unexcelled, unsurpassed
not capable of being improved on
not to be exceeded
incomparable, uncomparable
such that comparison is impossible; unsuitable for comparison or lacking features that can be compared
having desirable or positive qualities especially those suitable for a thing specified
of high or superior quality or performance
situated at the top or highest position
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v defeat thoroughly

mop up, pip, rack up, whip
Type of:
beat, beat out, crush, shell, trounce, vanquish
come out better in a competition, race, or conflict

adv to the highest degree of inferiority or badness

“She suffered worst of all”
“schools were the worst hit by government spending cuts”
“the worst dressed person present”

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