Definition of opsigamy in US English:

opsigamy

noun

rare
  • Marriage late in life.

Origin

Early 19th century; earliest use found in John Macculloch (1773–1835), surgeon and geologist. From Hellenistic Greek ὀψιγαμία marriage late in life from ὀψίγαμος late-married + -ία.

Pronunciation

opsigamy

/ɒpˈsɪɡəmi/