all the way
Also, the whole way. The entire distance, from start to finish, as in He ran all the way home, or The baby cried the whole way home. [Late 1700s]
Completely, as in I'm on your side all the way. [First half of 1900s]
See go all the way.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.