Essential nutrients refers to classes of nutrients found in food. Essential nutrients are simply those that are vital for the normal growth, maintenance and development of the body. There might be a slight confusion about essential nutrients that must be addressed.
Definition of waterproof for English Language Learners. : 1  designed to prevent water from entering or passing through. : 2  designed so that water alone will not remove it.
Learner's definition of INSULATION. [noncount]. 1. : a material or substance that is used to stop heat, electricity, or sound from going into or out of something: a material that insulates something. They used fiberglass insulation. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. 2.