sigh

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sigh

 [si]
1. a long, audible exhalation.
2. an intermittent inflation of the lungs with a large volume from a mechanical ventilator; this is essentially a deep breath that is incorporated into the ventilation cycle. The use of large tidal volumes has replaced the use of the sigh in many settings.

sigh

(),
1. An audible inspiration and expiration under the influence of some emotion.
2. To perform such an act.
[A.S. sīcan]

sigh

sigh

Respiratory medicine
A breath occurring at regular (predictable) intervals, possibly in response to a slow decrease in lung compliance, which is seen when constant ventilation is maintained; sighs tend to be followed by smaller than normal breaths.
 
Vox populi
A deep exhalation of breath, typically with an overtone of sadness or wistfulness.

sigh

Augmented breath Pulmonology A breath occurring at regular–predictable intervals, possibly in response to the slow ↓ in lung compliance seen when constant ventilation is maintained; sighs tend to be followed by smaller than normal breaths. Cf Noisy breathing.

sigh

()
1. An audible inspiration and expiration under the influence of some emotion.
2. To perform such an act.
[A.S. sīcan]

sigh (sī),

n an audible and prolonged inspiration followed by a shortened expiration.

sigh

complementary breathing cycles characterized by a quick, deep inspiration followed by a slower expiration; probably a compensatory mechanism to counter poor ventilation.
References in periodicals archive ?
Paskin, who is facing public order offences, broke down and wept as he told the sheriff that he had sighed because of the death of his grandfather.
Some time earlier a gang was caught by police and we sighed a sigh of relief.
ISLAMABAD, September 27, 2010 (Balochistan Times): Government has sighed a sigh of relief on being allowed time upto October 13 by the Supreme Court (SC) in connection with implementation of its verdict on National Reconciliation Ordinance (NRO).
The Queen Bee sighed, 'How heavy is my sweet gold,'
I suppose,' she sighed / as she lowered her head, / 'They are like the words / I can't take back, // from the rumor I spread.
He looked at me with those big eyes, sighed, gathered his smelly T-shirts together and moved out.
On the plaintive ballad,Blame It On My Youth, the audience sighed a collective sigh.
As the sun set and Amy took a sip of her wine, she sighed and began sharing the disappointments of her week on the job.
She stammered, shook her head and sighed as if to say, "Stop being a baby.
In the opening scene, Lawson-Roby writes, "I drove my pearl white Lexus SUV into the subdivision and sighed with much confusion.