Titter \Tit"ter\, v. i. To seesaw. See Teeter.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Titter \Tit"ter\, v. t. [imp. & p. p. Tittered; p. pr. & vb. n. Tittering.]

[Probably of imitative origin.]

To laugh with the tongue striking against the root of the upper teeth; to laugh with restraint, or without much noise; to giggle.

A group of tittering pages ran before. --Longfellow.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Titter \Tit"ter\, n. A restrained laugh. ``There was a titter of . . . delight on his countenance.'' --Coleridge.

Source: Webster's Revised Unabridged Dictionary (1913)