(of a contest, competition, etc) played in order to decide which person or team will progress to the final stages; preliminary
(of a statement) containing extra detail or explanation (which makes a prior statement less strong or less general)
Present participle of qualify.
www.Collinsdictionary.com (c) HarperCollins Publishers Ltd 2016
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License