Merriam-Webster added more than 500 new words to the dictionary this month, including the non-binary singular pronoun "they." 

"They: expanded to include this sense: 'used to refer to a single person whose gender identity is nonbinary,'" Merriam-Webster wrote in its post. "It's an expansion of a use that is sometimes called the 'singular they' (and one that has a long history in English). When a reflexive pronoun corresponding to singular use of they is needed, themself is seeing increasing use."

Merriam-Webster also previously addressed critics of the singular "they" in another blog post, noting that the pronoun has been consistently used since the 1300s. 

Other new additions include "free solo," "dad joke," "Bechdel test" and "deep state."  

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