In legal practice, habile describes something that is capable, apt or sufficient in law to achieve its intended
purpose—for example, averments habile to support the crave, a title habile to found an action, or evidence habile to infer liability.
The term is used chiefly in Scots law and is not defined by statute. It appears in case law and practice to assess relevancy and competency: are the pleadings, document or warrant legally suitable to ground the remedy, defence or procedural step sought? Typical usages include “habile pleadings,” “habile title,” and “habile to infer.” Where material is not habile, the usual consequence is dismissal or refusal on grounds of irrelevancy, incompetency or insufficiency in law.
In England and Wales, Northern Ireland and Ireland, the word is uncommon and often viewed as archaic; practitioners instead refer to material being “capable,” “valid,” “competent,” “apt,” or “sufficient in law.” Where “habile” does appear in those jurisdictions, it carries the same general sense of legal fitness for purpose.