The gum that builds up in the eye; sleep, gound.
"After a long night without rest, he wiped away the sleepy from his eyes to see clearly."
In plain English: There is no noun form of sleepy because it describes how someone feels, not an object you can hold.
"I gave him my sleepy after he told me that funny joke before bedtime."
ready to fall asleep
"beginning to feel sleepy"
"a sleepy-eyed child with drooping eyelids"
"sleepyheaded students"
Tired; feeling the need for sleep.
"After staying up late studying, I felt so sleepy that my eyes kept closing."
In plain English: Sleepy means feeling very tired and wanting to go to sleep right now.
"The baby fell asleep quickly because she was so sleepy after her nap."
Usage: Use "sleepy" to describe a state of drowsiness rather than deep exhaustion, and avoid confusing it with "sluggish," which implies general lethargy without necessarily indicating a desire to rest. Do not use it as a noun; instead, refer to the condition itself as "drowsiness."
Sleepy comes from Middle English slepy, which evolved directly from the Old English word for "one who sleeps." The term entered modern usage by simply adding a suffix to describe someone or something that is inclined toward sleep.