chil·​i·​ad | \ ˈki-lē-ˌad How to pronounce chiliad (audio) , -əd \

Definition of chiliad

1 : a group of 1000

What is the difference between a chiliad and a millennium?

What's the difference between a chiliad and a millennium? Not much: both words refer to a period of 1000 years. While millennium is more widely used, chiliad is actually older, first appearing in the late 1500s (millennium didn’t make its way into written English until the following century). Not surprisingly, both words trace back to roots that mean thousand. Millennium comes from the Latin mille, and chiliad is a descendent of the Greek chilioi.

First Known Use of chiliad

1598, in the meaning defined at sense 1

History and Etymology for chiliad

Late Latin chiliad-, chilias, from Greek, from chilioi thousand

Keep scrolling for more

Learn More about chiliad

Time Traveler for chiliad

Time Traveler

The first known use of chiliad was in 1598

See more words from the same year

Listen to Our Podcast about chiliad

Statistics for chiliad

Cite this Entry

“Chiliad.” The Dictionary, Merriam-Webster Inc., Accessed 26 January 2020.

More from Merriam-Webster on chiliad

Rhyming Dictionary: Words that rhyme with chiliad

Comments on chiliad

What made you want to look up chiliad? Please tell us where you read or heard it (including the quote, if possible).


to express in a more acceptable way

Get Word of the Day daily email!

Test Your Vocabulary

Intact Latin Quiz

  • roman tablet
  • What did focus mean in Latin?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!