Definition of "old money" in English

Noun

1. Families that have been wealthy for generations or members of such families.

2. The monetary system used in the United Kingdom and Ireland before decimalisation in 1971 and consisting of pounds, shillings, pence and farthings.

3. The imperial system of measurement or Fahrenheit, as opposed to the metric system or Celsius.

   • These scales say I weigh 72 kilograms; what's that in old money?