1. Complete and without restriction or qualification; sometimes used informally as an intensifier
   "down-the-line freedom";
   - absolute, downright, out-and-out, rank, right-down, sheer
    
2. Not making concessions
   "took a down-the-line stance in the peace talks";
   - uncompromising, sturdy, inflexible

See also: complete, hardline, hard-line

Encyclopedia: Down-the-line