Definition of sleeplessness in US English:

sleeplessness

noun

  • Inability to sleep; insomnia.

    ‘he began to suffer from bouts of sleeplessness’
    • ‘She made no complaints about the symptoms she is now describing, not even sleeplessness, nor was anything untoward observed.’
    • ‘The negative effects of sleeplessness range from lost productivity to mood problems to a greater likelihood of car accidents.’
    • ‘I finally read the warning about nervousness, dizziness, or sleeplessness.’
    • ‘What causes your sleeplessness is half the key to finding your way to a good night's rest.’
    • ‘Don't make up for a night of sleeplessness by napping.’
    • ‘A number of problems can contribute to your sleeplessness during pregnancy.’
    • ‘In the international classification of sleep disorders, there are well over 80 specific causes of sleeplessness.’
    • ‘Consuming caffeine later in the day can cause sleeplessness.’
    • ‘Milk contains tryptophan, which probably explains why a warm glass of milk at bedtime is a long-standing home remedy for sleeplessness.’
    • ‘Given the saddening condition of my sleeplessness, I was sorely in need of a nap.’

Pronunciation

sleeplessness

/ˈslipləsnəs//ˈslēpləsnəs/