Definition of "sleepiness" [sleep•i•ness]

• The property of being sleepy. (noun)

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• "In some cases, excessive daytime sleepiness is the only symptom."
• "It’s also possible that sleepiness is just a “side effect” associated with a more evolutionarily important reason for the release of oxytocin and vasopressin."
• "Jeff, your points are well taken, AOL/TW/Exxon/General Dynamic’s sleepiness is the best example of Levin’s greedy legacy."