The aim of this paper is to
show that the theory of free lattice-ordered groups developed by E. C. Weinberg in
the abelian case can be generalized to modules over a totally ordered Ore domain A.
The main result is that for every torsion-free ordered A-module M, there exists a free
f-module over M. The generalization given will be seen to be, in a certain sense, the
best possible.