per·pe·tu·i·ty /ˌpɜːpəˈtjuːəti $ ˌpɜːrpɪˈtuː-/ noun in perpetuity lawALWAYS/FOREVER for all future time 永久,永远 SYN forever The land had been promised to the Indian tribes in perpetuity. 这片土地已经被允诺永久归印第安各部落所有。
in perpetuity• The community does not own land in perpetuity.