kosher

American  

[koh-sher] / ˈkoʊ ʃər /

adjective

1. Judaism.

   1. fit or allowed to be eaten or used, according to the dietary or ceremonial laws.

      kosher meat; kosher dishes; a kosher Torah scroll.

   2. adhering to the laws governing such fitness.

      a kosher restaurant.

2. Informal.

   1. proper; legitimate.

   2. genuine; authentic.

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noun

1. kosher food.

   Where can I eat kosher in Mexico City?

verb (used with object)

1. to make kosher.

   to kosher meat by salting.

idioms

1. keep kosher, to adhere to the dietary laws of Judaism.

kosher British  

/ ˈkəʊʃə /

adjective

1. Judaism conforming to religious law; fit for use: esp, (of food) prepared in accordance with the dietary laws See also kasher kashruth

2. informal

   1. genuine or authentic

   2. legitimate or proper

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kosher ¹ Cultural  

1. Food that is permitted according to a set of dietary restrictions found in the Old Testament. For many Jews (see also Jews), foods that are not kosher cannot be eaten. The term can also be used colloquially to mean anything acceptable: “I don't think it's kosher to yell at your chess opponent when he is thinking about his next move.”

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kosher ² Cultural  

1. The descriptive term in Judaism for food and other objects that are clean according to its laws. These laws are contained in the Torah and forbid, for example, the eating of pork or shellfish, the mixing of dairy products and meat, and certain methods of slaughtering animals.

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Other Word Forms

• nonkosher adjective
• unkosher adjective

Etymology

Origin of kosher

First recorded in 1850–55 kosher for def. 1; 1885–90 kosher for def. 3; 1895–1900 kosher for def. 2; from Yiddish, from Ashkenazi pronunciation of Hebrew kāshēr “right, fit”

Explanation

In Jewish law, food must be ritually cleaned and prepared in order to be kosher, or fit to eat. Today, the word can also describe anything that is proper or legitimate. Is it kosher to date your best friend's ex? Depends on who you ask. The word kosher, literally meaning "clean" or "pure," refers to food that has been ritually prepared or blessed so it can be eaten by religious Jews. It comes from the Hebrew word kasher, meaning "proper" or "lawful," and became common in English in the mid-19th century. It is usually used as an adjective, as in "kosher meat." In the mid-1920s, the word took on a more general meaning, used to refer to anything that was acceptable.

Example Sentences

Aged 82, she had lived in Australia for decades and was honoured in 2022 for delivering kosher meals on wheels for decades, the group said.

From Barron's • Dec. 17, 2025

Joe Jurgielewicz & Son raises and sells a range of duck products, including kosher and halal options, and everything they produce is excellent.

From Salon • Dec. 4, 2025

The first Saturday of the month, our synagogue passes out free bottles of Israeli kosher wine to married couples celebrating anniversaries that month.

From The Wall Street Journal • Oct. 17, 2025

One, A.I. generations that significantly resemble samples from their training data are not protected by fair use, but filters that prevent chatbots from copying their sources are kosher.

From Slate • Jun. 30, 2025

Twenty minutes later, they were back on Second Avenue at B&H Dairy, the only decent kosher place between Gehinnom and the theater.

From "Night Owls" by A.R. Vishny

Related Words

• genuine
• real
• true
• unadulterated