"Youthquake" is the word that the Oxford English Dictionary has chosen as its word of the year.
Every year, many dictionaries choose their "word of the year." They may choose it because it had a special meaning for the year, or because it was suddenly being used much more than before.
"Youthquake" was used five times more this year than last year, according to the Oxford dictionary website.
Oxford defines youthquake as "a significant cultural, political or social change arising from the actions or influence of young people."

Source: Youthquake, Feminism: Words Of The Year