Lisp

To pronounce the sibilant letter s imperfectly; to give s and z the sound of th; -- a defect common among children.

To speak with imperfect articulation; to mispronounce, as a child learning to talk.

To speak hesitatingly with a low voice, as if afraid.

To pronounce with a lisp.

To utter with imperfect articulation; to express with words pronounced imperfectly or indistinctly, as a child speaks; hence, to express by the use of simple, childlike language.

To speak with reserve or concealment; to utter timidly or confidentially; as, to lisp treason.

The habit or act of lisping. See Lisp, v. i., 1.

a speech defect that involves pronouncing /s/ like voiceless ‘th’, /θ/ and /z/ like voiced ‘th’, /ð/

a flexible procedure-oriented programing language that manipulates symbols in the form of lists