a.

1. 永久的；長期的
   They hoped to live in perpetual happiness.

   他們希望生活在永久幸福之中。

2. 【口】無休止的；連續不斷的
   I'm tired of your perpetual nagging.

   我對你無休止的嘮叨厭煩了。

3. 無限期的；終身的
   He was perpetual president of the country.

   他是該國的終身總統。

4. 四季開花的
   That is a hybrid perpetual rose.

   那是一株雜種的四季開花的薔薇。

n.

1. 【植】四季開花的薔薇；多年生植物

adj.

1. never ending or changing.
   ▸denoting or having a position or trophy held for life rather than a limited period.
   ▸(of an investment) having no fixed maturity date.
2. occurring repeatedly.
3. (of a plant) blooming or fruiting several times in one season.