Comparative law notes
Known as 可以隨意終止的租賃 in Hong Kong.
There are multiple definitions - click on the translation that matches your context.
不定期租赁
名词
full
tenancy at will
noun
Definitions of tenancy at will
a tenancy that can be ended without notice
The issue as to whether Erimus was occupying under a tenancy at will or a periodic tenancy was important as it affected the notice period which it was required to give in order to vacate.