Definition of milliard in English:

milliard

noun

British
  • One thousand million (a term now largely superseded by billion).

    • ‘Of course, we used to use the word milliard for ‘one thousand million’.’
    • ‘The only one of these which has gained any currency in English is milliard (for a thousand million) but it must be quite unfamiliar to most people today.’
    • ‘The exports and imports of the world had, in 1840, a value of 28, in 1889 of 74, milliards of marks.’

Origin

Late 18th century: French, from mille thousand.

Pronunciation:

milliard

/ˈmɪlɪɑːd/