Live or act in accordance with; also, measure up to. For example, Children rarely live up to their parents' ideals, or This new technology has not lived up to our expectations. [Late 1600s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.