In a natural manner. / Inherently or by nature. / Surely or without any doubt.

(informal) Smart and fashionable.

(Jamaica, slang) Knotty.

(slang, sports, particularly bodybuilding) Natural, as opposed to steroid enhanced. / (slang) national

(slang, sports, particularly bodybuilding) Someone whose muscle gains are natural and not aided by the use of steroids. / (slang, sports) A national championship

The premier steeplechase (horse race over fences) in the United Kingdom

(idiomatic) A mindset, skill, or type of behavior so ingrained through habit or practice that it seems natural, automatic, or without a basis in conscious thought.

Clothing of a particular style and colours worn to represent a country at international events, or as part of national celebrations.

The normal, out-of-the-box preset resolution for a computer monitor or projector.

(Christianity) The birth of Jesus as described in the Gospels of Matthew and Luke. / (by extension) Christmas.