• Ack

    Origin 1

    Arbitrary formation.

    Full definition of ack

    Noun

    ack

    (plural acks)
    1. (military, now historical) The letter A as used in signalling and other types of communications.
      • 1929, Frederic Manning, The Middle Parts of Fortune, Vintage 2014, p. 173:They had to begin at the beginning: learning the Morse code, flag-wagging, a succession of acks, and practice on the buzzer.
    2. (data communications) acknowledgment signal

    Alternative forms

    • (data communications) ACK

    Antonyms

    Interjection

    1. (radio communications) acknowledged

    Derived terms

    Anagrams

    Origin 2

    Imitative.

    Interjection

    1. Expressing distaste, alarm, or trepidation.----
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