01 v. t. To laugh with the tongue striking against the root of the upper teeth; to laugh with restraint, or without much noise; to giggle.
imp. & p. p.
Tittered; p. pr. & vb. n.
Tittering
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1.
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.