Lisp v. i. [imp. & p. p. Lisped p. pr. & vb. n. Lisping.]
 1. To pronounce the sibilant letter s imperfectly; to give s and z the sound of th; -- a defect common among children.
 2. To speak with imperfect articulation; to mispronounce, as a child learning to talk.
 As yet a child, nor yet a fool to fame,
 I lisped in numbers, for the numbers came.   --Pope.
 3. To speak hesitatingly with a low voice, as if afraid.
    Lest when my lisping, guilty tongue should halt.   --Drayton.