SINCE 1828

An Encyclopædia Britannica Company

1

sixty-eighth

adjective

Definition of sixty-eighth

1 :being number 68 in a countable series

the sixty-eighth day

— see Table of Numbers

2 :being one of 68 equal parts into which something is divisible

a sixty-eighth share of the money

There's more!

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!

2

sixty-eighth

noun \ " \

Definition of sixty-eighth

1 :number 68 in a countable series

2 :the quotient of a unit divided by 68 :one of 68 equal parts of something

one sixty-eighth of the total

There's more!

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!

Seen and Heard

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

show

WORD OF THE DAY

holus-bolus

play

all at once

BROWSE DICTIONARY

sixty

sixty-eight

sixty-eighth

sixty-fifth

sixty-first

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

Which is a synonym of fuliginous?

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

Words at Play

alt-59c17b8172892

'So Long': A Common But Mysterious Goodbye

Its origins are surprisingly murky.

alt-59c13729150dc

"Immune to" or "Immune from"?

Nobody is immune to this question.

alt-59bff395cf879

What's Going On With 'Nonplussed'?

Its recent usage is hard to shrug off.

alt-59bad350d88f1

Welcome to the New Words

From 'hive mind' to 'sriracha'

Ask the Editors

video-title-words-of-the-year-1066

Words of the Year: 1066

Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless

Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals

Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

stylized-drawing-of-woman-pole-vaulting-across-gap-to-get-trophy

Challenging Vocabulary Quiz Returns!

No tricks, just difficult words.

Take the quiz

Name that Color!

NEW! Additional colors! More obscure than before!

Take the quiz

How Strong Is Your Vocabulary?

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Take the quiz

SCRABBLE® Sprint

SCRABBLE® Sprint

SCRABBLE® fans, sharpen your skills!

Play the game