In a statement, Casper Grathwohl, president of Oxford Dictionaries said: "Reviewing this year in language we repeatedly encountered the word "toxic" being used to describe an increasing set of conditions that we're all facing".
The Oxford Dictionary has named "overtourism" as one of its 2018 Words of the Year, following an ongoing campaign from the Telegraph Travel for the word to be recognised in its annual list.
The word toxic was selected from a shortlist that included contenders such as "gaslighting, ' 'incel" and 'tech-lash'.
The data shows that along with a 45 per cent rise in the number of times it has been looked up on oxforddictionaries.com, over the previous year the word toxic has been used in an array of contexts, both in its literal and more metaphorical senses.
'In its original literal use to refer to poisonous substances toxic has been ever-present in discussions of the health of our communities and our environment.
"With the #MeToo movement putting a spotlight on toxic masculinity, and watershed political events like the Brett Kavanaugh Senate judiciary committee hearing sparking global debate, the term toxic masculinity has well and truly taken root in the public consciousness and got people talking in 2018", the statement said.
Toxic gases rise from cracks in the Leilani Estates subdivision near Pahoa, Hawaii, during this year's eruption of the Kilauea volcano.
'Toxic has truly taken off into the realm of metaphor, people have reached for the word to describe workplaces, schools, cultures, relationships and stress. Oxford Dictionaries' judgment is that "toxic" illuminates something about this year.
It adds the "Me Too" movement has "put the spotlight on toxic masculinity" whereas in politics more broadly "the word has been applied to the rhetoric, policies, agendas and legacies of leaders and governments around the globe".
This word has been habitually used along other words in social media and oral sense when talking about chemical stuff, masculinity, substance, gas, environment, relationship, culture, waste, algae and air in order of frequency in 2018.
Last year's word of the year was "youthquake", defined as 'a significant cultural, political, or social change arising from the actions or influence of young people'.