/ ˈbɪgəmi; NAmE / noun
[ U ] the crime of marrying sb when you are still legally married to sb else
—compare monogamy , polygamy
► big·am·ous / ˈbɪgəməs; NAmE / adjective :
a bigamous relationship
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WORD ORIGIN
Middle English : from Old French bigamie , from bigame bigamous, from late Latin bigamus , from bi- twice + Greek -gamos married.