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Acknowledgement or acknowledgment?

acknowledgement is a noun meaning “Alternative spelling of acknowledgment”; acknowledgment is a noun meaning “The act of acknowledging”. Wiktionary gives them as spellings of the same word. In written English (wordfreq, 2021 data) acknowledgement is about 1.6 times as common as acknowledgment.

acknowledgementoracknowledgment

What is the difference between acknowledgement and acknowledgment?

acknowledgementacknowledgment
Part of speechnounnoun
Meaning

UKAlternative spelling of acknowledgment

The act of acknowledging

The act of recognizing in a particular character or relationship; recognition of existence, authority, truth, or genuineness

Examplenone recorded
Formsacknowledgementsacknowledgments
Pronunciationnot recorded/əkˈnɒl.ɪd͡ʒ.mənt/ /əɡˈnɒl.ɪd͡ʒ.mənt/ /əkˈnɑ.lɪd͡ʒ.mənt/
In writing2.1 times per million words1.3 times per million words

Sources: acknowledgement and acknowledgment in the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

Every current meaning of acknowledgement and acknowledgment

acknowledgement

  1. 1

    noun UKAlternative spelling of acknowledgment

acknowledgment

  1. 1

    noun The act of acknowledging

  2. 2

    noun The act of recognizing in a particular character or relationship; recognition of existence, authority, truth, or genuineness

    He just grunted in acknowledgment of my greeting

  3. 3

    noun A reward or other expression or token of gratitude

  4. 4

    noun An expression of gratitude for a benefit or an obligation

    the acknowledgment of a favor

  5. 5

    noun A message from the addressee informing the originator that the originator's communication has been received and understood

    the acknowledgment of a wedding invitation

  6. 6

    noun A response (ACK) sent by a receiver to indicate successful receipt of a transmission (See Wikipedia article on transmission)

  7. 7

    noun A recognition as genuine or valid; an avowing or admission in legal form

    acknowledgment of a deed

  8. 8

    noun The act of a person admitting a child as their own

Source: the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); obsolete, archaic, dialect and rare senses left out.

Which is more common, acknowledgement or acknowledgment?

acknowledgement appears 2.1 times per million words; acknowledgment 1.3 times per million words.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

The words