The Oxford Thesaurus An A-Z Dictionary of Synonyms - determinationn.

1) resoluteness, resolution, firmness, resolve, steadfastness, tenacity, perseverance, fortitude, doggedness, persistence, constancy, single-mindedness, will (power) , Colloq grit, guts: The idea is a good one, if only she has the determination to see it through. 2) settlement, resolution, resolving, decision, solution, judgement, verdict, outcome, result, upshot, conclusion, end, termination: None of us could live in peace till the determination of the border dispute. 3) fixing, settling, ascertainment, ascertaining, delimitation, definition: The determination of our position is critical in setting our course.