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Mason jar

Mason jar

3 3.2
A glass container with a screw lid that keeps air out to preserve food
  • noun
  • /ˈmeɪsən dʒɑr/
  • US
translation icon : tarro Mason
  • She stored her homemade jam in several Mason jars to keep it airtight.
  • fill the Mason jar
  • quart-size Mason jar
  • small Mason jar

I mean, that's half a small Mason jar full of garlic powder.

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Examples

  • The recipe calls for sealing the pickles in a Mason jar to preserve their freshness.

  • As he began his inventory of ancient Mason jars, he found at the end of a shelf a box wrapped in newspaper tied with grocer's twine.

    Fiction book (2002)
  • When she was little, she would always capture the poor things in a Mason jar and set them free outdoors.

    Fiction book (1998)
  • So we put them in the Mason jars because they seal.

  • Then I'd climb up on the footstool and grab the Mason jar.

    Fiction book (2001)
  • She cut lilacs and kept them in a Mason jar on her nightstand.

    Fiction book (1996)
  • One day in late spring, Mrs. Thayer walked into class after the bell rang and placed a Mason jar of jonquils on her desk.

    Fiction book (1998)
  • Jacob stood leaning against the rusty-topped deep freezer drinking lime Kool-Aid from a Mason jar.

    Fiction book (1998)
  • Everything else was left behind: piles of old clothes, a root cellar full of empty Mason jars, strings of peppers tied to the rafters.

    Blog text (15)
  • Please prepare the ingredients and place them in a clean Mason jar for storage.

Synonyms

jar
vsMason jar
207 1.0

A wide glass or clay container for storing food

is a specific sealed glass type used for home preserving
crock
vsMason jar
14 6.2

A thick clay pot used to store food or drink

is glass and made to seal tightly for preserving at home
earthenware jar
vsMason jar
1 3.7

A jar made of baked clay used for storing food or liquids

is glass and designed to form an airtight seal for canning
jamjar
vsMason jar
1.2

A small glass jar for keeping jam or jelly

is specially designed for airtight sealing and home canning
jampot
vsMason jar
6.3

A small jar for jam or fruit preserves

is larger and made to seal food for long storage

How Airtight

Mason jar
  • US
3 3.2
screwtop
3.3
jar
207 1.0

Surface Forms

Mason jar singular
Mason jars plural

Morphology

Mason + jar

The word 'jar' clearly signals a container, so learners who know 'jar' will recognize it's a type of jar, but 'Mason' is a proper name/brand (not the occupational meaning 'mason') and does not transparently indicate the screw-top, air‑tight canning function. Because the key functional meaning (airtight screw lid for preserving) is not predictable from the constituents, the expression is only partially transparent to a B1 learner.

Etymology

Mason jar is named after John Landis Mason, who invented a glass jar with a screw-top lid that made an airtight seal. Imagine turning the lid to lock the air out so the food stays fresh, and that is why a Mason jar is used 'to preserve' or 'to keep food fresh'.