a.

1. 隱祕不明的，別有用心的
   There was no ulterior motive in his proposal.

   他的建議裡沒有不可告人的動機。

2. 在那邊的；較遠的
3. 日後的，將來的；進一步的
   I want to know what is our ulterior action.

   我想要知道下一步的行動是什麼。

adj.

1. other than what is obvious or admitted:
   she had some ulterior motive in coming.
2. beyond what is immediate or present.