English Reference
noun · adjective

ABC

n. · adj.
US /ˈeɪˌbiˌsi/ abc

  1. 01

    n.the letters of a language, usually the English alphabet from A to Z.

    n.the English alphabet in its entirety. Often used in the plural as 'ABCs' in informal contexts.

    Simple

    The toddler is already starting to learn her ABCs by singing the song.

    In context

    The toddler is already starting to learn her ABCs by singing the song.

  2. 02

    n.the simplest and most important facts about a subject.

    n.the fundamental principles or rudimentary elements of a particular subject or activity.

    Simple

    You need to master the ABC of nutrition before you start a strict diet.

    In context

    You need to master the ABC of nutrition before you start a strict diet.

  3. 03 Television

    n.a major television or radio network, such as those in the US or Australia.

    n.a proper noun referring to major national broadcasters, most notably the American Broadcasting Company or the Australian Broadcasting Corporation.

    Simple

    The news report was first aired on ABC during the evening slot.

    In context

    The news report was first aired on ABC during the evening slot.

  4. 04 Medicine

    n.the first three things doctors check: airway, breathing, and circulation.

    n.a mnemonic for airway, breathing, and circulation, representing the primary survey in emergency medicine.

    Simple

    The paramedic followed the ABC protocol to ensure the patient was stable.

    In context

    The paramedic followed the ABC protocol to ensure the patient was stable.

  5. 05

    adj.related to atomic, biological, or chemical weapons.

    adj.pertaining to atomic, biological, and chemical warfare or weaponry. Often used as an attributive modifier.

    Simple

    The soldiers were trained to handle an ABC attack during their basic training.

    In context

    The soldiers were trained to handle an ABC attack during their basic training.


Etymology 1

From Middle English abece, ABC, from the first three letters of the Latin alphabet, standing for the whole alphabet.

Etymology 2

Initialisms.

Etymology 3

Like QWERTY, the name is based on the first letter keys.

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

This entry
Origin Middle English abece
Level A2 · Elementary
Frequency Common
Updated