IPA: /dɪˈɡæmi/
KK: /dɪˈɡæmi/
A second marriage that occurs after the first marriage has ended.
After her divorce, she entered into a digamy with someone she met online.
Digamy is formed from "di-" (meaning two) and "gamos" (meaning marriage). The word refers to the state of being married to two different people at different times, hence the concept of two marriages.
Think of 'two' ('di-') marriages ('gamos') to remember that digamy refers to being married twice.