Image copyright PA Image caption Jeremy Corbyn was said to have benefited from a "youthquake" after a surge in support from millennials

Oxford Dictionaries has deemed "youthquake" the 2017 word of the year, reflecting what it calls a "political awakening" among millennial voters.

It was first coined in the 1960s by Vogue editor Diana Vreeland, who used it to describe sudden changes in fashion, music and attitudes.

Oxford Dictionaries said its use had seen a recent resurgence, to describe young people driving political change.

Oxford Dictionaries' Casper Grathwohl said it was "not an obvious choice".

But he said Youthquake's use in everyday speech had increased five-fold during 2017.

"In the UK, where it rose to prominence as a descriptor of the impact of the country's young people on its general election, calls it out as a word on the move," he said.

Mr Grathwohl said youthquake's use in Britain peaked during the June general election, after polls delivered a better-than-expected result for the Labour party.

Other words in contention:

Antifa - a short word for "anti-fascist"

- a short word for "anti-fascist" Broflake - a man who is readily upset by progressive attitudes, from the derogatory use of "snowflake"

- a man who is readily upset by progressive attitudes, from the derogatory use of "snowflake" Kompromat - the Russian term for material used in blackmail

- the Russian term for material used in blackmail Unicorn - adding rainbow colours to things - especially food

- adding rainbow colours to things - especially food Milkshake duck - a person or character on social media that appears to be endearing at first, but is found to have an unappealing back story

Oxford Dictionaries said the word sounded a note of hope after what it described as a "difficult and divisive year".

The word of the year is a word, or expression, that Oxford Dictionaries deems has "attracted a great deal of interest during the year to date" and is drawn from newspapers, books, blogs and transcripts of spoken English.

Last year's word, "post-truth", was chosen after the 2016 Brexit vote and Donald Trump's victory in the US presidential election.

The Oxford English Dictionary has updated its definition of youthquake to: "A significant cultural, political, or social change arising from the actions or influence of young."

It was previously defined as the "series of radical political and cultural upheavals occurring among students and young people in the 1960s".