プログレッシブ和英中辞典(第4版)の解説
そっけつ【即決】
「a prompt [an immediate] decision;〔裁判の〕summary judgment
即決する decide promptly [immediately, on the spot]
事態は即決を要する
The situation calls for an immediate decision.
即決裁判
a summary trial [decision]
即決裁判を行う
try ((a case)) summarily/pass 「summary judgment [an instant sentence] ((on a person))