Definition of "titter" [tit•ter]

• To laugh in a restrained, nervous way; giggle. (verb-intransitive)
• A nervous giggle. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Her standing out in the room was the signal for a convulsed titter from the other prisoners."
• ""Prefer chaney to cricket?" asked Urquhart's uncle, with his agreeable laugh that was too attractive to be described as a titter, a name that its high, light quality might have suggested."
• "Or rather, she read the first two pages, gave the kind of titter that frightens dogs and small children, then announced with finality, Well, you have some good lines here."