The relevant dictionaries for an article in the UK Independent would be the OED, Collins, or Cambridge. https://www.lexico.com/definition/millennium https://ww

The relevant dictionaries for an article in the UK Independent would be the OED, Collins, or Cambridge. https://www.lexico.com/definition/millennium https://www.lexico.com/definition/millennium https://www.collinsdictionary.com/dictionary/english/millennia https://www.collinsdictionary.com/dictionary/english/millenn... https://dictionary.cambridge.org/dictionary/english/millennia https://dictionary.cambridge.org/dictionary/english/millenni...