1. A fixed, unchanging pattern of behavior or activities that remains the same over time without variation
His invariable routine included morning coffee at 6 AM every single day.
Sua rotina invariável incluía café da manhã às 6 da manhã todos os dias.
2. In computing/programming, a set sequence of operations that does not change regardless of input or conditions
The software follows an invariable routine for processing data entries.
O software segue uma rotina invariável para processar entradas de dados.