全部 (quán bù) means all, the whole, or the entire amount. 全 means complete or whole and 部 means part or section, so together they stress that every part is included. It can precede a noun (全部学生, all students) or stand alone as a noun/pronoun (这是全部, this is all of it). It is stronger and more emphatic than 都 (dōu, all) alone, and is often paired with 都: 全部都... (all of them...).