Also in the running was "coulrophobia," the fear of clowns, and "hygge," a Danish concept meaning "a quality of cosiness and comfortable conviviality that engenders a feeling of contentment or well-being." From The Guardian:
Defined by the dictionary as an adjective “relating to or denoting circumstances in which objective facts are less influential in shaping public opinion than appeals to emotion and personal belief”, editors said that use of the term “post-truth” had increased by around 2,000% in 2016 compared to last year. The spike in usage, it said, is “in the context of the EU referendum in the United Kingdom and the presidential election in the United States”...
Contenders for the title had included the noun “alt-right”, shortened from the fuller form “alternative right” and defined as “an ideological grouping associated with extreme conservative or reactionary viewpoints, characterised by a rejection of mainstream politics and by the use of online media to disseminate deliberately controversial content”. First used in 2008, its use “surged” this spring and summer, said the dictionary, with 30% of usage in August alone. Brexiteer was also in the running for the crown, along with non-political terms including coulrophobia, the fear of clowns, and hygge, the Danish concept of cosiness.
But the increase in usage of post-truth saw the term eventually emerge ahead of the pack. “We first saw the frequency really spike this year in June with buzz over the Brexit vote and Donald Trump securing the Republican presidential nomination. Given that usage of the term hasn’t shown any signs of slowing down, I wouldn’t be surprised if post-truth becomes one of the defining words of our time,” predicted Oxford Dictionaries president Casper Grathwohl.