Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

Pioneer Day

noun

Definition of Pioneer Day 

1 : July 24 observed as a legal holiday in Utah in commemoration of the arrival of Brigham Young on the present site of Salt Lake City in 1847

2 : June 15 formerly observed as a legal holiday in Idaho as the anniversary of the acceptance of the Oregon treaty by the president and the senate in 1846

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Learn More about Pioneer Day

Share Pioneer Day

Resources for Pioneer Day

Cite Time Traveler Time Traveler! Explore the year a word first appeared

Dictionary Entries near Pioneer Day

piolet

pion

pioneer

Pioneer Day

pioneer gold

pioneer tunnel

pioner

Statistics for Pioneer Day

Look-up Popularity

Comments on Pioneer Day

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

Show Comments  Hide Comments 

WORD OF THE DAY

nary

not any or not one

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ

Love words? Need even more definitions?

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

Words at Play

Ask the Editors

Word Games