n.

1. 计算；测算，估计，推测[U][C]
   By my reckoning we are miles from the factory.

   我估计我们离开工厂有数英里。

2. 账单[C]
3. 结账[U]
4. 【喻】算账，惩罚[C][S1]
   At some time there would have to be a reckoning with her.

   迟早非得跟她算帐不可。

5. （船舶等的）航迹推算（定位）[U]

n.

1. the action of calculating.
2. an opinion or judgement.
3. archaic a bill or account, or its settlement.
4. an instance of working out consequences or retribution for one's actions:
   a terrible reckoning.