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.
So with that out of the way, the world's longest tree is a Coast Redwood located in Montgomery State Reserve, CA. named the Mendocino Tree. The Mendocino Tree measures in at 367.5 feet with a diameter of 10 feet 4 inches and is estimated to be about 1,000 years old. The Mendocino Tree captured the record after the existing world's longest tree, located in the Redwood National Park, CA., lost 10 feet of it's top in a storm. UPDATE: November17, 2008.