Definition of sunning:
(n) :
The star that is closest to the Earth.
(n) :
(astronomy) A star, especially when seen as the centre of any single solar system.
(n) :
The light and heat which are received from the sun; sunshine or sunlight.
(v) :
(transitive) To expose to the heat and radiation of the sun.
(v) :
(transitive) To warm or dry in the sunshine.
(v) :
(intransitive) To be exposed to the sun.