English Reference
noun · verb

comma

n. · v.
US /ˈkɑmə/ UK /kˈɒmɐ/ com·ma UK spelling comma's, comma's

  1. 01 A1 Beginner

    n.the mark (,) used to separate words in a list or to show a small break in a sentence.

    n.a punctuation mark used to indicate a slight separation between grammatical elements or to delimit items in a series.

    Simple

    Please remember to put a comma between the city and the country.

    In context

    The editor insisted that the author use an Oxford comma to ensure the list of ingredients was perfectly clear to the reader.

  2. 02 C2 Proficiency Technical Music

    n.a very small difference in pitch between two musical notes that seem almost the same.

    n.a minute difference in pitch resulting from different ways of calculating nearly identical intervals, such as the Pythagorean comma.

    Simple

    The musician explained how a comma affects the tuning of the piano.

    In context

    In historical temperament studies, the syntonic comma represents the small frequency discrepancy between four perfectly tuned fifths and two octaves plus a major third.

  3. 03 C2 Proficiency Technical Science

    n.a type of butterfly that has a white mark shaped like a comma on its wings.

    n.any of various nymphalid butterflies of the genus Polygonia, characterized by a comma-shaped silver or white mark on the underside of the wings.

    Simple

    We saw a beautiful comma butterfly resting on a leaf in the garden.

    In context

    The Comma butterfly is easily identified by its ragged wing edges and the distinctive white C-shaped mark on its hindwing underside.

  4. 04 C2 Proficiency Formal

    v.to put commas into a piece of writing.

    v.to insert commas into a text for the purpose of punctuation or delimitation.

    Simple

    The student had to comma the long paragraph to make it easier to read.

    In context

    The manuscript was heavily commaed by the proofreader to conform to the house style guide.

    punctuate

From Latin comma, from Ancient Greek κόμμα (kómma), from κόπτω (kóptō, “I cut”).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Ancient Greek κόμμα
Level A1 · Beginner
Frequency Frequent
Updated