Definition of perron in US English:

perron

noun

Architecture
  • An exterior set of steps and a platform at the main entrance to a large building such as a church or mansion.

    • ‘They have made their own contributions to it, particularly by changing the entrance front from the west to the east side and building a granite perron.’
    • ‘On the side facing the street, the house is reasonably symmetrical, organized around a large stone tower (perron).’

Origin

Late Middle English: from Old French, literally ‘large stone’, from Latin petra ‘stone’.

Pronunciation