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Related to tittering: teetering on the edge
The activity of laughing; the manifestation of mirth or joy, or, less commonly, sarcasm or scorn
Alternative medicine See Laughter club, Laughter therapy, Laughter yoga
Neurology Spasmodic and largely involuntary expirations often accompanied by inarticulate vocalisations, generally evoked by mirth
Physiology Laughter increases blood flow to the brain and activates neural networks—e.g., nucleus accumbens (NAcc) and amygdala. Functional MRI data suggests that the increase in blood flow to NAcc evoked by extreme humour is similar to that triggered by monetary gain or use of some addictive drugs; a key symptom of depression is the lack of a sense of reward from previously rewarding activities—e.g., humour
Psychiatry Laughter is regarded as the most effective coping skill for anxiety-panic disorders and may temporarily alleviate the symptoms of anxiety and depression


A series of inarticulate sounds produced as an expression of emotion, usually happiness or mirth. The role of humor and laughter in promoting a positive attitude and health and in preventing the progress of some diseases has been documented esp. when it is combined with proven medical therapies.

compulsive laughter

Laughter without cause, occurring in certain psychoses, esp. schizophrenia.

pathological laughter

Uncontrolled laughter (occasionally accompanied by, or alternating with, uncontrolled crying), caused by pseudobulbar lesions of the brain. These lesions may result from lacunar strokes, multiple sclerosis, anoxic brain injury, and other forms of brain injury.
References in periodicals archive ?
IT'S a sight that would have Frankie Howerd tittering in his toga.
In a grade-school religion claw, she listened as one female teacher sternly lectured a roomful of tittering girls: "As you grow older and become a woman, you are going to grow hair under your arms.
And he couldn't help tittering when we tried out a few quips from our resident joker Greg Bennett - of Greg's Giggles fame on the Letters page.
But stop tittering, the race raises cash for local charity.
But for our future King and Queen, it's clear that the tittering times they are a-changin'.
APPARENTLY much tittering ensued at the Fraser Inquiry when Bovis boss Alan Mack was asked when it would be that the new Parliament building in Edinburgh would be finished.