noun
one chance; only opportunity
A straightforward loanword from English, used in Japanese to emphasize a single, often critical, opportunity.
これが最後のワンチャンスだ。
This is the last one chance.
彼はワンチャンスをものにした。
He seized his only opportunity.
Variant with a middle dot; less common but seen in some contexts.
Loanword from English 'one chance'.