Verb (5-dan, る, transitive)
1. to restrict; to limit; to confine
使用はよほどの時に限りましょう。Let's limit its use to real emergencies.
Verb (5-dan, る, intransitive)
2. to be restricted to; to be limited to; to be confined to
隠れられる場所は限られる。There are only so many places to hide.
3. to be best (for); to be the best plan; to be the only way (to)
as ...は...に限る
こういう時は飲んで忘れるに限る。At times like this, there is nothing better than drinking to forget.