Meaning : Give up in the face of defeat of lacking hope. Admit defeat.
Example :
In the second round, the challenger gave up.
Synonyms : chuck up the sponge, drop by the wayside, fall by the wayside, give up, quit, throw in, throw in the towel
Become a participant. Be involved in.
Enter a race.Meaning : Withdraw from established society, especially because of disillusion with conventional values.
Example :
She hasn't heard from her brother in years--he dropped out after moving to California.
Meaning : Leave school or an educational program prematurely.
Example :
Many students drop out because they are not prepared for our challenging program.