Nap
noun, verbal noun
A noon sleep is sleep you do during the day, also known as a nap.
The readings for this word are both kun'yomi readings. You learned them when you learned the kanji, so you should be able to read this on your own.
ちょこっと昼寝してくるねー。
I'm going to take a little nap.
昼寝から目覚めると、すでに夜の七時を回っていた。
When I woke up from my nap, it was already past 7 p.m.
コウイチはただ今昼寝中です。おかけになって少々お待ちください。
Koichi is napping at the moment. Please be seated and wait for a moment.