Definition of unitarity in English:

unitarity

Pronunciation /ˌyo͞onəˈte(ə)ritē/

noun

See unitary

‘In particular, global unitarity is automatically present whenever there is a global time coordinate, but need not be if that condition is not met.’
  • ‘Instead, everything would be determined by unitarity, that is, probability conservation, and certain characteristic patterns in the scattering.’