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  • lisp
    lisp
    noun
  • LISP
    LISP
    noun
    a high-level programming language that processes data in the form of lists: widely used in artificial intelligence applications.
Synonyms

lisp

1 American  
[lisp] / lɪsp /

noun

lisps plural
  1. Phonetics.

    1. the systematic articulation of s and z in a forward, dental position, like th- sounds, as a manifestation of a speech disorder or a stylistic affectation.

    2. any unconventional articulation of the sibilants, as the pronunciation of s and z with the tongue between the teeth lingual protrusion lisp, close to or touching the upper front teeth dental lisp, or raised so that the breath is emitted laterally lateral lisp.

  2. the act, habit, or sound of lisping.


verb (used with or without object)

lisps, present (3rd person singular) lisped, past participle, past lisping present participle
  1. to pronounce or speak with a lisp.

  2. to speak imperfectly, especially in a childish manner.

LISP 2 American  
[lisp] / lɪsp /

noun

Computers.
  1. a high-level programming language that processes data in the form of lists: widely used in artificial intelligence applications.


lisp 1 British  
/ lɪsp /

noun

  1. the articulation of s and z like or nearly like the th sounds in English thin and then respectively

  2. the habit or speech defect of pronouncing s and z in this manner

  3. the sound of a lisp in pronunciation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to use a lisp in the pronunciation of (speech)

  2. to speak or pronounce imperfectly or haltingly

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
LISP 2 British  
/ lɪsp /

noun

  1. a high-level computer-programming language suitable for work in artificial intelligence

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

Inflected Forms

Nouns

Participles

Conjugated Forms

Present

Past

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Etymology

Origin of lisp1

First recorded before 1100; Middle English wlispen, lipsen, Old English āwlyspian; akin to Dutch lisp(el)en, German lispeln, Norwegian leipsa

Origin of LISP2

lis(t) p(rocessing)

Explanation

A lisp is a manner of speaking so that s and other similar consonants are blurred into more of a th- sound. Most little kids have a bit of a lisp when they first start speaking. If you speak with a lisp, you can also say that you tend to lisp — and if you lisp in a way that makes it hard for people to understand what you're saying, you can visit a speech therapist who will teach you to speak without a lisp. Sometimes dental work — braces, or a mouth that's numb from having cavities filled — can give you a temporary lisp. Lisp comes from the imitative Old English wlisp.

Keep Reading on Vocabulary.com

Vocabulary lists containing lisp

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“Tho thsorry,” I sighed with a slight lisp from my new Invisaligns.

From Los Angeles Times Nov. 7, 2025

They were specifically made to preserve his natural lisp and so important he carried two sets with him at all times.

From BBC Feb. 6, 2024

When I was a kid, I started doing elocution lessons because I had a really bad lisp.

From New York Times Dec. 6, 2023

Moore employs a subtle, impeccable lisp in Gracie’s voice; Portman studiously echoes it.

From Seattle Times Nov. 13, 2023

The new injury endowed the big oaf with a disconcerting lisp.

From "Hoot" by Carl Hiaasen

The programming behind Aaron - written in LISP, which was invented by one of the founding fathers of artificial intelligence, John McCarthy, back in the 1960s - attempts to do just that.

From BBC Sep. 17, 2015

In 1958 — two years after organizing the first conference on artificial intelligence — McCarthy invented the computer programming language LISP.

From Nature Nov. 2, 2011

McCarthy in 1959 was turning his interest from chess to a new way of talking to the computer, the whole new "language" called LISP.

From Hackers, Heroes of the Computer Revolution Chapters 1 and 2 by Levy, Steven

Amiga Persecution Complex is by no means limited to Amiga users; NeXT, NeWS, OS/2, Macintosh, LISP, and GNU users are also common victims.

From The Jargon File, Version 4.2.2, 20 Aug 2000 by Steele, Guy L.

Nearly every hacker knows one of C or LISP, and most    good ones are fluent in both.

From The Jargon File, Version 4.0.0, 24 Jul 1996 by Raymond, Eric S.

And even my dialect coach was really anti- the idea for a while because it was creating lisps in my mouth, which wasn’t right.

From Los Angeles Times Jun. 20, 2024

They are two different entities that operate as one, babbling to each other as pint-size radio announcers with slight lisps.

From Seattle Times Sep. 14, 2022

Her dad also lisps very slightly on “S” sounds but it’s not as pronounced.

From Slate Jan. 28, 2021

He lisps a little, because he has just two teeth left.

From US News May 3, 2015

A five-year-old is cute when he lisps and stutters.

From "The Absolutely True Diary of a Part-Time Indian" by Sherman Alexie

His voice, slightly lisped, pinballs from story to story, often landing back at the place he started.

From Los Angeles Times Apr. 10, 2022

Alone in the room, I look at him: his quizzical face, problem skin, lisped mouth; his long body, a still hyphen.

From The Guardian Mar. 30, 2019

One of the little girls handed her a copy to inscribe and lisped her name.

From The New Yorker Feb. 2, 2017

The PG-13 lyrics are lisped and gulped into sonic oatmeal.

From Slate Aug. 12, 2016

Arya thought it was funny the way Vargo Hoat lisped and slobbered, but she knew better than to laugh.

From "A Clash of Kings" by George R.R. Martin

This pubescent Vance has been adorned with a rainbow propeller hat and a swirly lollipop, morphed into a patriotic Minion from Despicable Me, and rendered as lisping Hans Landa, the Nazi villain from Inglourious Basterds.

From Slate Mar. 5, 2025

And at last, we get the spectacle of Mullally unleashed as the apparently dotty, sort-of wheelchair-bound mom, lisping her way to glory.

From Los Angeles Times Oct. 6, 2023

“That was my intention — I’m a little prec-iousss about that,” he says, laughing as he drops a quick lisping impression of Gollum.

From Washington Post Mar. 3, 2021

He gave each character such a unique voice and accent that I can still hear his lisping version of Gollum in Tolkien’s trilogy.

From Salon Sep. 28, 2019

It was like a heavy shaking of talcum powder in the brain hearing all those mothers complimenting each other’s daughters and lisping back in good Castilian to the Sisters of the Merciful Mother.

From "In the Time of the Butterflies" by Julia Alvarez

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