n.

1. 計算；測算，估計，推測[U][C]
   By my reckoning we are miles from the factory.

   我估計我們離開工廠有數英里。

2. 帳單[C]
3. 結帳[U]
4. 【喻】算帳，懲罰[C][S1]
   At some time there would have to be a reckoning with her.

   遲早非得跟她算帳不可。

5. （船舶等的）航跡推算（定位）[U]

1. reckon的動詞現在分詞、動名詞

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.