Dictionary.net

• tall symmetrical pine of western North America having long blue-green needles in bunches of 3 and elongated cones on spreading somewhat pendulous branches; sometimes classified as a variety of ponderosa pine

2006 - WordNet 3.0
By Princeton University

• tall symmetrical pine of western North America having long blue-green needles in bunches of 3 and elongated cones on spreading somewhat pendulous branches; sometimes classified as a variety of ponderosa pine

2011 - English Dictionary Database
By DataStellar Co., Ltd