ounce

noun (1)
\ ˈau̇n(t)s How to pronounce ounce (audio) \

Definition of ounce

 (Entry 1 of 2)

1a : a unit of weight equal to ¹/₁₂ troy pound — see Weights and Measures Table
b : a unit of weight equal to ¹/₁₆ avoirdupois pound
c : a small amount an ounce of sense

ounce

noun (2)

Definition of ounce (Entry 2 of 2)

First Known Use of ounce

Noun (1)

14th century, in the meaning defined at sense 1a

Noun (2)

1774, in the meaning defined above

History and Etymology for ounce

Noun (1)

Middle English, from Anglo-French unce, from Latin uncia 12th part, ounce, from unus one — more at one

Noun (2)

Middle English unce lynx, from Middle French, alteration (by misdivision, as if l'once the ounce) of lonce, probably from Old Italian lonza, from Middle Greek lynk-, lynx, from Greek

Keep scrolling for more

Learn More About ounce

Time Traveler for ounce

Time Traveler

The first known use of ounce was in the 14th century

See more words from the same century

Dictionary Entries Near ounce

oul

Ouled Naïl

Oulu

ounce

ounce metal

ouph

our

See More Nearby Entries 

Statistics for ounce

Cite this Entry

“Ounce.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ounce. Accessed 23 Jul. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

More Definitions for ounce

ounce

noun
\ ˈau̇ns How to pronounce ounce (audio) \

Kids Definition of ounce

1 : a unit of weight equal to ¹/₁₆ pound (about 28 grams)
2 : a unit of liquid capacity equal to ¹/₁₆ pint (about 30 milliliters)

ounce

noun
\ ˈau̇n(t)s How to pronounce ounce (audio) \

Medical Definition of ounce

1a : a unit of troy weight equal to ¹/₁₂ troy pound or 31.103 grams
b : a unit of avoirdupois weight equal to ¹/₁₆ avoirdupois pound or 28.350 grams

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

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!