Hypersomnia - refers to a type of type of dyssomnia that involves being chronically sleepy and sleeping for long periods at a time. Also means sleeping too much or being too sleepy during the day.
It is a sleeping disorder; an abnormally excessive sleep. A person with this condition falls asleep several times a day.
Other /More definition:
Hypersomnia refers to excessive daytime sleepiness. This can result from depression, insomnia, narcolepsy, sleep apnea, sleep drunkenness, periodic limb movements, drug abuse, and other problems. Hypersomnia is abnormally excessive sleep. A person with this condition falls asleep several times a day, chronically sleepy and sleeping for long periods at a time.
Hypersomnia is also defined as a sleep disturbance in which the affected individual sleeps too much or being too sleepy during the day.
Other /More definition:
hypersomnia refers to abnormally excessive sleep. A person with this condition falls asleep several times a day.