Dictionary.net

• common and widely distributed tall timber pine of western North America having dark green needles in bunches of 2 to 5 and thick bark with dark brown plates when mature

2006 - WordNet 3.0
By Princeton University

• common and widely distributed tall timber pine of western North America having dark green needles in bunches of 2 to 5 and thick bark with dark brown plates when mature

2011 - English Dictionary Database
By DataStellar Co., Ltd