0 past simple and past participle of titter
1 to laugh nervously, often at something that you feel you should not be laughing at:
A couple of the younger teachers tittered at his dirty jokes.
Their performance left the audience tittering with embarrassed laughter.
She tittered and blushed.
Schoolkids usually titter hysterically at any nudity.
She tittered like a schoolgirl telling a naughty story.
