Meaning of O level

O lev•el

Pronunciation: (ō' lev"ul), [key]
— Brit. Brit.
  1. a public examination for secondary-school students, usually 15 to 16 years old, testing basic knowledge in various subjects, required before advancing to more specialized courses of study.
  2. a pass in this examination.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.