National Thesaurus Day, also known as Thesaurus Day, is celebrated on January 18 each year. It honors the birthday of Peter Mark Roget, the British physician who created 'Roget's Thesaurus', one of the most famous reference books in the English language. A thesaurus groups words with similar or related meanings, helping writers find just the right word.
History of National Thesaurus Day
Peter Mark Roget was born in London on January 18, 1779. He became a physician and scientist with wide interests, studying everything from optics to the slide rule. Throughout his life, he struggled with depression, and making lists, including lists of words, was one way he found order and calm.
Roget began compiling a classified list of words in 1805 for his own use. After retiring, he expanded it, and in 1852, at age 73, he published the 'Thesaurus of English Words and Phrases'. Unlike a dictionary, which lists words alphabetically, Roget organized words by ideas and concepts.
The book was a success and has never gone out of print. Roget's son and grandson continued updating it. The word 'thesaurus' comes from the Greek word for 'treasury' or 'storehouse'. Today, digital thesauruses are built into word processors and websites.
Why National Thesaurus Day Matters
A thesaurus helps writers, students and speakers express themselves more precisely and creatively.
Exploring synonyms builds vocabulary, which supports reading comprehension and communication.
The day also offers a lesson in using words carefully: synonyms often carry different shades of meaning, so the 'fancier' word isn't always the best choice.
A thesaurus is also a tool for clear communication at work and school. Repeating the same word can make writing dull, while choosing a precise word can make an argument stronger. Good writers often use a thesaurus for ideas and then check each option in a dictionary to be sure it fits the tone and meaning they intend.
How to Celebrate National Thesaurus Day
- Learn a new word: find a fresh synonym and use it today.
- Revise a paragraph: replace vague words with precise ones.
- Play word games: try synonym challenges or crosswords.
- Compare meanings: check a dictionary before swapping words.
- Browse Roget's: explore how words are grouped by idea.
Celebrating at Work, School and Home
At work, challenge coworkers to replace overused office jargon with clearer words. In classrooms, students can create synonym webs, play word association games or revise writing with a thesaurus and a dictionary. At home, families can play games that build vocabulary, such as finding as many words for 'big' or 'happy' as possible.
Fun Facts About National Thesaurus Day
- Peter Mark Roget was born on January 18, 1779.
- Roget's thesaurus was first published in 1852.
- 'Thesaurus' comes from the Greek word for 'treasury'.
National Thesaurus Day FAQs
When is National Thesaurus Day?
National Thesaurus Day is celebrated on January 18 each year.
Why is Thesaurus Day on January 18?
It's the birthday of Peter Mark Roget, born in 1779.
When was Roget's Thesaurus published?
It was first published in 1852.
What does thesaurus mean?
It comes from the Greek word for 'treasury' or 'storehouse'.
What is the difference between a thesaurus and a dictionary?
A dictionary defines words; a thesaurus groups words with similar or related meanings.
How do I use a thesaurus well?
Choose synonyms carefully and check their meaning in a dictionary.