Meaning of down-the-line

down-the-line

Pronunciation: (doun'u līn'), [key]
— adj.
  1. complete, full, unreserved, or whole-hearted: a down-the-line endorsement.
—adv.
  1. fully; completely; whole-heartedly: Will you support it down-the-line?
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.