Definitions
There are 2 meanings of the phrase
School Day.
School Day - as a noun
Any day on which school is in session
Example: "Go to bed early because tomorrow is a school day"
The period of instruction in a school; the time period when school is in session
Example: "Stay after school"
Synonyms (Exact Relations)
schoolschooltimeExample Sentences
"I woke up early on my first school day."
"The school day lasts from 8am to 3pm."
"On my last school day, I said goodbye to all my friends."
"Every school day is filled with learning and studying."
"During the school day, we have different classes and activities."