Yes because an English dictionary is a historical record of how English speakers and writers
use words and phrases making no judgement as to their 'correctness' or whether an audience of current English speakers would understand you were you to use them.
The purpose of a dictionary is to aid you in understanding the meaning any English speaker or writer is trying to convey independent of the time period or location, not to dictate valid and invalid words. Some words might be dropped from abridged dictionaries when they fall out of popularity but in 'The English Dictionary' (which doesn't really exist but is approximated by dictionaries like Oxford's) words are added but never removed.
This is different, than say, the mission of L'Académie française which is to act as a language regulator and maintain the official vocabulary and grammar of French.