Dictionary.net

• the extent of a 2-dimensional surface enclosed within a boundary; "the area of a rectangle"; "it was about 500 square feet in area"

2006 - WordNet 3.0
By Princeton University

• the extent of a 2-dimensional surface enclosed within a boundary; "the area of a rectangle"; "it was about 500 square feet in area"

2011 - English Dictionary Database
By DataStellar Co., Ltd