na-adjective, noun which may take the genitive case particle 'no', noun
the worst; worst possible
Used as a noun, の-modifier, or na-adjective for the worst state, result, case, or quality among alternatives.
Antonyms: 最良
That was the worst possible result.
The situation is the worst it could be.
Colloquial evaluative use, often said by itself as an exclamation meaning something like 'This is awful' or 'That sucks.'
Ugh, this is awful! I forgot my wallet.
Today was a terrible day.
in the worst case; if worst comes to worst
Colloquial adverbial use at the start of a clause; it is close to 最悪の場合 but shorter and more conversational.
In the worst case, we can take a taxi and make it on time.
According to the forecast, tomorrow's weather looks like it's going to be the worst.
I missed the train. Ugh, that's the worst!
In the worst case, it might not be finished by tomorrow.
For him, this was the worst possible outcome.
まあまあ describes something acceptable though unremarkable, whereas 最悪 describes something as the worst possible.
最悪 means 'the worst', the direct opposite of 上々's 'the very best'.
最悪 means 'worst', the direct opposite of 最適's 'best/optimal' when describing a condition or choice.
最悪 means 'the worst', the direct opposite of 最善, which means 'the very best'.
最悪 describes the worst possible conditions or situation, the direct opposite of 絶好's best possible conditions.
最悪 means 'the worst (quality)', contrasting with 最上 used for 'the finest/best'.
worst-ever; history's worst
worst of the worst; despicable; extremely bad
record low; worst ever