noun. a temporary state in which you are unable (or unwilling) to sleep.
- -ness (English)
- sleepless (English)
- -less (English)
Example sentences of the word sleeplessness
1. Noun, singular or mass
If you're experiencing sleeplessness or depression, talk to a medical professional to find out which, if any, of these supplements may be most beneficial for you.
2. Verb, base form
Going to bed when you're full or hungry can also lead to sleeplessness.
It is produced in the pineal gland in the brain when it's dark outside -- thus its nickname, “the hormone of darkness.” Deficiencies in this hormone can cause sleeplessness, among many other side-effects.