1. A word, phrase, or linguistic form that is no longer in common use and is considered outdated or archaic
The word 'thou' is an obsolete usage in modern English.
A palavra 'vós' é um uso obsoleto no português moderno.
2. A manner or custom of using language that has fallen out of practice due to changes in the language over time
Using 'thee' and 'thou' represents obsolete usage from Shakespearean English.
Usar 'ti' e 'te' em certos contextos representa uso obsoleto do português antigo.