NEW YORK (AP) — On Dec. 31, China reported a cluster of pneumonia cases of unknown origin to the World Health Organization. By Jan. 31, WHO declared an outbreak of a novel coronavirus a global health emergency. Come March 11, the world was facing down the COVID-19 pandemic.

Parents sat children down to explain what a pandemic is. Related terms usually restricted to medicine and science stormed into everyday conversation. Over time, we were pandemic baking and pandemic dating and rescuing pandemic puppies from shelters.

All of which led Dictionary.com on Monday to declare “pandemic” its 2020 word of the year.

Searches on the site for the word spiked more than 13,500% on March 11, senior research editor John Kelly told The Associated Press in an interview ahead of the announcement.

“That's massive, but even more telling is how high it has sustained significant search volumes throughout the entire year. Month over month, it was over 1,000% higher than usual. For about half the year, it was in the top 10% of all our lookups.”

Another dictionary, Merriam-Webster, also selected pandemic as its word of the year earlier Monday.

Kelly said pandemic beat out routine lookups usually intended to sort more mundane matters, such as the differences between “to, two and too.”

“That's significant,” Kelly emphasized. “It seems maybe a little bit obvious, and that's fair to say, but think about life before the pandemic. Things like pandemic fashion would have made no sense. The pandemic as an event created a new language for a new normal.”

Lexicographers often factor out routine lookups when evaluating word trends.

The pandemic, Kelly said, made us all worthy of watercooler chatter with Dr. Anthony Fauci as our knowledge grew about aerosols, contact tracing, social distancing and herd immunity, along with the intricacies of therapeutic drugs, tests and vaccines that can help save lives.

“These were all part of a new shared vocabulary we needed to stay safe and informed. It's incredible,” said Kelly, who works with a team of lexicographers to come up with words of the year based primarily on site traffic.

Asymptomatic, furlough, non-essential, hydroxychloroquine and a host of other pandemic-related words saw massive increases in lookups as well.

Jennifer Steeves-Kiss, chief executive officer of Dictionary.com, said one key ingredient in the hunt for the site's word of the year is sustained interest over time. Pandemic met that standard.

“This has affected families, our work, the economy,” she said. “It really became the logical choice. It's become the context through which we've had dialogue all through 2020. It's the through line for discourse.”

The word pandemic has roots in Latin and the Greek pandemos, meaning “common, public.” Breaking it down further, “pan” means “all” and “demos” means “people.” As evidenced in a medical text by a Dutch-born physician, Gideon Harvey, pandemic entered English in the 1660s in the medical sense, Kelly said. He noted that “demos” is also the basis for the word democracy.

A pandemic is defined by Dictionary.com as a disease “prevalent throughout an entire country, continent, or the whole world; epidemic over a large area.” Its broader sense, as evidenced in its roots, can be used thusly: “A pandemic fear of atomic war.”

Dictionary.com also noted other worthy search trends beyond the pandemic. After the May 25 death of George Floyd under the knee of a Minneapolis police officer, words around racial justice experienced spikes, including fascism, anti-fascism, defund and white fragility.

“There was no way for us to leave that out of the conversation this year,” Kelly said.