An Encylopedia Britannica Company

Learner's Dictionary mobile search

×

Learner's Dictionary

Thunder Bay

1 ENTRIES FOUND:

Thunder Bay (proper noun)

Save

Thunder Bay proper noun

Thunder Bay

proper noun

Learner's definition of THUNDER BAY

: city in Ontario, Canada

Comments & Questions

Comments & Questions

What made you want to look up Thunder Bay? Include any comments and questions you have about this word.

ASK THE EDITOR

Is "they're" a pronoun or verb + noun?

See the answer »

LEARNER'S QUIZZES

Vocabulary Quiz Icon

Vocabulary Quiz

Test your word power

Take the Quiz »

Name That Thing Icon

Name That Thing

Take our visual quiz

Test Your Knowledge »

LEARNER'S WORD OF THE DAY

Stealthy Illustration

: quiet and secret in order to avoid being noticed

Learn More »

The Merriam-Webster
Unabridged Dictionary

Merriam-Webster Unabridged Book Cover

Online access to a
legendary resource
Log In or Sign Up »

Learning Spanish?
We can help

Learner's Dictionary Book Cover

Visit our free site designed
especially for learners and
teachers of Spanish
SpanishCentral.com »

Woman With Cell Phone

Our Dictionary,
On Your Devices

Merriam-Webster,
With Voice Search
Get the Free Apps! »

Merriam-Webster's
Visual Dictionaries

Visual Dictionary Book Cover

The new edition of the
remarkable reference
features 8,000
illustrations.
Learn More »

Join Us

Learner's Dictionary
on Twitter »

Learner's Dictionary
on Facebook »

Bookstore: Digital and Print

Merriam-Webster references for Mobile, Kindle, print, and more. See all »

Other Merriam-Webster Dictionaries

Webster's Unabridged Dictionary » Britannica English - Arabic Translation » Nglish - Spanish-English Translation »

Spanish Central » Visual Dictionary » WordCentral for Kids »

Browse the Learner's Dictionary

© 2019 Merriam-Webster, Incorporated