n.

1. （道義上或法律上的）義務；責任[C][U][（+to）][+to-v]
   We were under obligation to finish the work in a satisfactory way.

   我們有義務圓滿地完成工作。

   You are under no obligation to buy the house if you have not signed a purchase agreement.

   如果你沒有簽訂購買合同，就不一定非買這房子不可。

   Our parents fulfilled their obligation to support us.

   父母親盡到了撫養我們的責任。

2. 恩惠[C][（+to/toward）]
   I will take care that my obligations to you shall be amply repaid.

   我一定會加倍報答您對我的恩惠。

3. 合約，契約；證券[C]
   The builder failed to fulfill the terms of his obligation.

   營造商未能履行合同的條款。

4. 償付債務的款項[C]
   The lawyer drew up a legal paper discharging him from all obligations.

   律師擬定了一份法律文件，免除他所有的債務款項。

n.

1. an act or course of action to which a person is morally or legally bound.
   ▸the condition of being so bound.
2. a debt of gratitude for a service or favour.