Source : Webster's Revised Unabridged Dictionary (1913)

Outdoors \Out"doors`\, adv.
   Abread; out of the house; out of doors.

Source : WordNet®

outdoors
     n : where the air is unconfined; "he wanted to get outdoors a
         little"; "the concert was held in the open air"; "camping
         in the open" [syn: {out-of-doors}, {open air}, {open}]

outdoors
     adv : outside a building; "in summer we play outside" [syn: {outside},
            {out of doors}, {alfresco}] [ant: {inside}, {inside}]