Used other than as an idiom: see drop, out.(verb)
Prematurely and voluntarily leave (school, a race, or the like).(verb)
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Use "drop out" in a sentence
"Possible Motives: Trying to get Lee to drop out so he would become the number one GTT pledge; revenge on Dr. Darity for threatening to close down the frats."
"If she had won she would have insisted that Jon Fox, and anybody else, drop out of the race and support her candidacy."
"His father Abbulu had to drop out of school in 5 {+t} {+h} standard as he could not afford to pay the school fee of Rs. 5."