1. a word, phrase, or expression that is no longer in common use and has been replaced by newer terminology
The word 'thee' is an obsolete term in modern English.
A palavra 'vós' é um termo obsoleto no português moderno.
2. language that is outdated and rarely used in contemporary communication
Using obsolete terms can make your writing seem archaic.
Usar termos obsoletos pode fazer sua escrita parecer arcaica.