\ˈsak \

Definition of sac 

(Entry 1 of 5)

: a pouch within an animal or plant often containing a fluid a synovial sac


abbreviation (1)

Definition of sac (Entry 2 of 5)



Definition of Sac (Entry 3 of 5)

variant of

Definition of SAC (Entry 4 of 5)

1 special agent in charge

2 Strategic Air Command

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Other Words from sac


saclike \ˈsak-​ˌlīk \ adjective

Examples of sac in a Sentence

Recent Examples on the Web: Noun

Slide Attico’s feathered jacquard pouch or Ming Ray’s crystal sac on your wrist for a night on the town, or go with Alexander Wang’s tongue-in-cheek credit card bag, which is made for your inner party girl. Madeline Fass, Vogue, "Goodbye, Box Bags! These Evening Pouches Are Perfect for Your Holiday Parties," 15 Nov. 2018 Undescended Testicles In some males, during fetal development, one or both testicles fail to descend from the abdomen into the sac that normally contains the testicles (a.k.a. Jennifer Gerson, Marie Claire, "Can Men Cause Fertility Issues?," 1 Oct. 2018 On Monday, storm debris lay in piles around the cul-de-sac—broken boards, bent window screens, a television, couch cushions. Erin Ailworth, WSJ, "After Florence, Rescue Team Gets a Glimmer of Sun, and Thanks," 18 Sep. 2018 South of that would be eight houses clustered around a cul-de-sac that connects with Monroe. Kimberly Fornek,, "Day care center on former Amlings site may include flood relief for area," 18 Apr. 2018 Under code, a street with a cul-de-sac cannot exceed 800 feet in length. Bob Sandrick,, "Brecksville approves 22-lot subdivision off Dewey Road," 9 Apr. 2018 In the third inning, Winker walked and made his way around to score on a sac fly line drive to right field from Joey Votto, who finished 2-for-5 with an RBI. Adam Baum,, "Career day for Eugenio Suárez leads the Cincinnati Reds over the Pirates," 7 Apr. 2018 Today the house is in a subdivision and we are located in a cul-de-sac. Joanne Kempinger Demski, Milwaukee Journal Sentinel, "Stone farmhouse in Cedarburg has grown but kept its rustic vibe," 12 July 2018 In this episode, one of Nancy's friends climbs a beautiful tree in the neighborhood cul-de-sac. Taylor Seely, USA TODAY, "Exclusive: Watch this 'Fancy Nancy' sneak-peek clip before show premieres on Disney Junior Friday, July 13," 12 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sac.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sac


1741, in the meaning defined above

History and Etymology for sac


French, literally, bag, from Latin saccus — more at sack

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Statistics for sac

Last Updated

20 Nov 2018

Look-up Popularity

Time Traveler for sac

The first known use of sac was in 1741

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English Language Learners Definition of sac

: a part inside the body of an animal or plant that is shaped like a bag and that usually contains liquid or air


\ˈsak \

Kids Definition of sac

: a part of a plant or animal resembling a bag and often containing a liquid or air

Other Words from sac

saclike \-​ˌlīk \ adjective


\ˈsak \

Medical Definition of sac 

: a soft-walled anatomical cavity usually having a narrow opening or none at all and often containing a special fluid a synovial sac — see air sac, amniotic sac, dental sac, lacrimal sac

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More from Merriam-Webster on sac

Rhyming Dictionary: Words that rhyme with sac

Spanish Central: Translation of sac

Nglish: Translation of sac for Spanish Speakers

Britannica English: Translation of sac for Arabic Speakers

Comments on sac

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


a soft lustrous wool fabric with mohair

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