Wordnet 3.0
NOUN (1)
1. 
 the solid part of the earth's surface; 
- Example: "the plane turned away from the sea and moved back over land"- Example: "the earth shook for several minutes"- Example: "he dropped the logs on the ground"[syn: land, dry land, earth, ground, solid ground, terra firma]
WordNet (r) 3.0 (2006):
solid ground
    n 1: the solid part of the earth's surface; "the plane turned
         away from the sea and moved back over land"; "the earth
         shook for several minutes"; "he dropped the logs on the
         ground" [syn: land, dry land, earth, ground, solid
         ground, terra firma]