The definition of "they" as a nonbinary pronoun was added to the other definitions of the world in September. It refers to a person whose gender identity is nonbinary, and the phrase has become more prevalent on social media, edited text and personal interactions.
"There's no doubt that its use is established in the English language," dictionary officials said, prompting its addition to the Merriam-Webster.com dictionary.
Other terms that were popular searches in 2019 included "quid pro quo," "impeach," "crawdad" and "egregious," according to the dictionary's website.
Previous words of the year selected by Merriam-Webster were "justice" in 2018, "feminism" in 2017 and "surreal" in 2016, CNN reported.