1. An old-fashioned, outdated, or ancient method, custom, or way of doing something that is no longer commonly used
The use of quill pens is now considered an archaic practice in modern offices.
O uso de penas de ganso é agora considerado uma prática arcaica nos escritórios modernos.
2. A traditional or historical procedure that belongs to an earlier period and is rarely applied in contemporary contexts
Blood-letting was once a common medical treatment but is now regarded as an archaic practice.
A sangria foi uma vez um tratamento médico comum, mas agora é considerada uma prática arcaica.