bad or ill in the highest, greatest, or most extreme degree

the worst person.

most faulty, unsatisfactory, or objectionable

the worst paper submitted.

most unfavorable or injurious.

in the poorest condition

the worst house on the block.

most unpleasant, unattractive, or disagreeable

the worst personality I've ever known.

most lacking in skill; least skilled

the worst typist in the group.

that which is worst.

in the most evil, wicked, severe, or disadvantageous manner.

with the most severity, intensity, etc.; in the greatest degree.

to defeat; beat

He worsted him easily.

at worst

if the worst happens; under the worst conditions

He will be expelled from school, at worst. Also, at the worst.

get the worst of something

to be defeated by; lose

to get the worst of a fight.

if worst comes to worst

if the very worst happens

If worst comes to worst, we still have some money in reserve.

in the worst way

Informal . in an extreme degree; very much

She wanted a new robe for Christmas in the worst way. Also, the worst way.

verb

beat , best , conquer , master , overcome , prevail against , rout , subdue , subjugate , surmount , triumph over , vanquish

adjective

bad , inferior , least , lowest , unfavorable