Lisp Definition

lĭsp
lisped, lisping, lisps
noun
A speech defect or mannerism characterized by mispronunciation of the sounds (s) and (z) as (th) and ( th ).
American Heritage
The act or speech defect of lisping.
Webster's New World
The sound of lisping.
Webster's New World
A high-level computer language used esp. in artificial intelligence.
Webster's New World
Synonyms:
  • list processing language
pronoun

A functional programming language with a distinctive parenthesized syntax, much used in artificial intelligence.

Wiktionary
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verb
To speak with a lisp.
American Heritage
To substitute the sounds () and () for the sounds of s and z, as from a speech defect or as an affectation (Ex.: pronouncing sing as though it were thing)
Webster's New World
To speak imperfectly or like a child.
Webster's New World
To utter with a lisp or in an imperfect or childlike way.
Webster's New World
To pronounce the sibilant letter "˜s' imperfectly; to give "˜s' and "˜z' the sounds of "˜th' (IPA: /θ / ð/) "” a defect common amongst children.
Wiktionary
Synonyms:
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Other Word Forms of Lisp

Noun

Singular:
lisp
Plural:
lisps

Origin of Lisp

  • From Middle English lispen to lisp from Old English -wlyspian (in āwlyspian to lisp) from wlisp lisping

    From American Heritage Dictionary of the English Language, 5th Edition

  • Contraction of list processing.

    From Wiktionary

  • lis(t) p(rocessing)

    From American Heritage Dictionary of the English Language, 5th Edition

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