To confine or restrict something to a particular limit or local area; also the limited scope or range resulting from such confinement.
この議論を個別のケースに局限して考えよう。
Let's limit this discussion to individual cases.
彼の関心は国内問題に局限しているようだ。
His interests seem to be confined to domestic issues.
問題の範囲を局限するのは難しい場合がある。
Sometimes it's difficult to narrow down the scope of a problem.