1. A modification, alteration, or adjustment that takes effect from a date in the past, applying to events or conditions that occurred before the change was officially made
The retroactive change in tax policy affected all transactions from January 1st.
A mudança retroativa na política fiscal afetou todas as transações desde 1º de janeiro.
2. In legal or administrative contexts, a decision or rule that is made now but applies backward to an earlier time period
The company announced a retroactive change to employee benefits dating back six months.
A empresa anunciou uma mudança retroativa nos benefícios dos funcionários com efeito retroativo de seis meses.