Princeton's WordNet(2.25 / 8 votes)Rate this definition: 1  contract(noun) a binding agreement between two or more persons that is enforceable by law. 2  contract, declaration(noun) (contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make.
View full size image. Until 2013, the oldest individual tree in the world was Methuselah, a 4,845-year-old Great Basin bristlecone pine (Pinus longaeva) in the White Mountains of California.nd on the other side of the world, in an Andes Mountains grove in Chile, we have a 3,642-year-old Patagonian cypress (Fitzroya cupressoides). The ancient specimen, which is sometimes called the Alerce (alerce is a common Spanish name for F. cupressoides), is the third-oldest tree to have its exact age calculated.
Many of these trees may be even older than their listed ages, but the oldest wood in the tree has rotted away. For some old trees, so much of the centre is missing that their age cannot be directly determined. Instead, estimates are made based on the tree's size and presumed growth rate. colony of 47,000 quaking aspen trees (nicknamed  Pando ), covering 106 acres (43 ha) in the Fishlake National Forest of Utah, is considered one of the oldest and largest organisms in the world.