godan verb (-ru), transitive verb
Transitive use: actively set a limit on something. Often used with を.
人数を10人に限ります。
We will limit the number of people to ten.
話を要点だけに限ってください。
Please confine your remarks to the main points.
godan verb (-ru), intransitive verb
be limited to; be restricted to
Intransitive use: something is limited to a certain range or condition. Often used with に.
この特典は会員に限ります。
This privilege is limited to members.
応募は一人一通に限ります。
Applications are limited to one per person.
godan verb (-ru), intransitive verb
is best; is the best plan; is the only way
Fixed pattern ...は...に限る, meaning 'nothing beats ...' or '... is the best'. Expresses a strong recommendation.
夏は冷たいビールに限る。
In summer, nothing beats a cold beer.
疲れたときは寝るに限る。
When you're tired, sleeping is the best thing to do.