The noise that the plane makes is sometimes so loud that you cannot hear any other noise. Sound is a type of energy. Sounds are produced when an object vibrates. When this happens, the air around the object also vibrates. These vibrations in the air travel as sound waves. A jet engine makes a great deal of sound energy. The engine sounds loud when it is close, but you can sometimes hear the noise when the plane is even several miles away from you.
Definition of Polymer. A large molecule consisting of chains or rings of linked monomer units, usually characterized by high melting and boiling points.
Polymer. Definition. noun, plural: polymers. (1) A compound made up of several repeating units (monomers) or protomers. (2) The product of polymerization. Supplement. Polymers are made from monomers linked by chemical bonds. They are produced by polymerization, and occur either naturally or synthetically.