mole

noun (1)
\ ˈmōl How to pronounce mole (audio) \

Definition of mole

 (Entry 1 of 6)

: a pigmented spot, mark, or small permanent protuberance on the human body especially : nevus

mole

noun (2)

Definition of mole (Entry 2 of 6)

1 : any of numerous burrowing insectivores (especially family Talpidae) with tiny eyes, concealed ears, and soft fur
2 : one who works in the dark
3 : a machine for tunneling
4 : a spy (such as a double agent) who establishes a cover long before beginning espionage broadly : one within an organization who passes on information

mole

noun (3)

Definition of mole (Entry 3 of 6)

: an abnormal mass in the uterus especially when containing fetal tissues

mole

noun (4)

Definition of mole (Entry 4 of 6)

1 : a massive work formed of masonry and large stones or earth laid in the sea as a pier or breakwater
2 : the harbor formed by a mole

mole

noun (5)
\ ˈmōl How to pronounce mole (audio) \
variants: or less commonly
plural moles

Definition of mole (Entry 5 of 6)

: the base unit of amount of pure substance in the International System of Units that is defined as having exactly 6.02214076 x 1023 indivisible units (such as atoms or molecules) of that substance First you would need to measure out one mole of salt. Remember that one mole of a compound equals its relative molecular mass in grams, so to obtain one mole of sodium chloride you would weigh out 58.5 g …— John Atkinson and Carol Hibbert one mole of helium contains 4 grams

mole

noun (6)
mo·​le | \ ˈmō-lā How to pronounce mole (audio) \

Definition of mole (Entry 6 of 6)

: a spicy sauce made with chiles and usually chocolate and served with meat

First Known Use of mole

Noun (1)

14th century, in the meaning defined above

Noun (2)

14th century, in the meaning defined at sense 1

Noun (3)

15th century, in the meaning defined above

Noun (4)

circa 1548, in the meaning defined at sense 1

Noun (5)

1902, in the meaning defined above

Noun (6)

1882, in the meaning defined above

History and Etymology for mole

Noun (1)

Middle English, from Old English māl; akin to Old High German meil spot

Noun (2)

Middle English; akin to Middle Low German mol

Noun (3)

Middle English, from Latin mola mole, literally, mill, millstone — more at mill

Noun (4)

Middle French, from Old Italian molo, from Late Greek mōlos, from Latin moles, literally, mass, exertion; akin to Greek mōlos exertion

Noun (5)

German Mol, short for Molekulargewicht molecular weight, from molekular molecular + Gewicht weight

Noun (6)

Mexican Spanish, from Nahuatl mōlli sauce

Learn More About mole

Time Traveler for mole

Time Traveler

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

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Dictionary Entries Near mole

moldy rot

mole

molecast

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Cite this Entry

“Mole.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mole. Accessed 4 Dec. 2021.

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More Definitions for mole

mole

noun
\ ˈmōl How to pronounce mole (audio) \

Kids Definition of mole

 (Entry 1 of 2)

: a small usually brown spot on the skin

mole

noun

Kids Definition of mole (Entry 2 of 2)

: a small burrowing animal with soft fur and very small eyes

mole

noun
\ ˈmōl How to pronounce mole (audio) \

Medical Definition of mole

 (Entry 1 of 3)

: a pigmented spot, mark, or small permanent protuberance on the human body especially : nevus

mole

noun

Medical Definition of mole (Entry 2 of 3)

: an abnormal mass in the uterus:
a : a blood clot containing a degenerated fetus and its membranes

mole

noun
variants: also mol \ ˈmōl How to pronounce mole (audio) \

Medical Definition of mole (Entry 3 of 3)

: the base unit in the International System of Units for the amount of pure substance that contains the same number of elementary entities as there are atoms in exactly 12 grams of the isotope carbon 12 a mole of photons a mole of sodium chloride

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