unfamiliar

adjective

un·​fa·​mil·​iar ˌən-fə-ˈmil-yər How to pronounce unfamiliar (audio)
Synonyms of unfamiliarnext
: not familiar:
a
: not well-known : strange
an unfamiliar place
often used with to
used words that were unfamiliar to me
b
: not well acquainted
unfamiliar with the subject
unfamiliarity
ˌən-fə-ˌmil-ˈyer-ə-tē How to pronounce unfamiliar (audio)
-ˌmi-lē-ˈyer-
-ˈya-rə-
noun
unfamiliarly adverb

Examples of unfamiliar in a Sentence

He gets nervous when he is in unfamiliar surroundings. The book is full of unfamiliar words.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
According to researchers, the robot, working much like a human navigating an unfamiliar environment, blends reactive behaviors with deliberate planning. Jijo Malayil, Interesting Engineering, 9 Dec. 2025 The colors are unfamiliar; the flavors are not flashy or sculpted into waves like in other shops. Francesco Pacifico, The Dial, 9 Dec. 2025 Aside from the unease of contemplating something unfamiliar, stories involving driverless cars don’t always inspire confidence. Eric D. Lawrence, Freep.com, 9 Dec. 2025 The Texans come in at 7-5 boasting the top defense in the NFL, while the Chiefs are in an unfamiliar spot at 6-6. Tyler Everett, MSNBC Newsweek, 7 Dec. 2025 See All Example Sentences for unfamiliar

Word History

First Known Use

1594, in the meaning defined above

Time Traveler
The first known use of unfamiliar was in 1594

Browse Nearby Words

Cite this Entry

“Unfamiliar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfamiliar. Accessed 15 Dec. 2025.

Kids Definition

unfamiliar

adjective
un·​fa·​mil·​iar ˌən-fə-ˈmil-yər How to pronounce unfamiliar (audio)
1
: not well-known : strange
an unfamiliar place
2
: not well acquainted
unfamiliar with the subject
unfamiliarity
-ˌmil-ˈyar-ət-ē How to pronounce unfamiliar (audio)
-ˌmil-ē-ˈ(y)ar-
noun

More from Merriam-Webster on unfamiliar

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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